leaf

Definitions

  • A rabbit eating a leaf
    A rabbit eating a leaf
  • WordNet 3.6
    • v leaf produce leaves, of plants
    • v leaf turn over pages "leaf through a book","leaf a manuscript"
    • v leaf look through a book or other written material "He thumbed through the report","She leafed through the volume"
    • n leaf hinged or detachable flat section (as of a table or door)
    • n leaf a sheet of any written or printed material (especially in a manuscript or book)
    • n leaf the main organ of photosynthesis and transpiration in higher plants
    • ***

Additional illustrations & photos:

Sat There Like a Frog on A Pond Lily Leaf 308 Sat There Like a Frog on A Pond Lily Leaf 308
Showing key and leaf patterns Showing key and leaf patterns
Repeated fan, leaf and bead pattern Repeated fan, leaf and bead pattern
Showing extensive interwoven leaf and stem forms and animals Showing extensive interwoven leaf and stem forms and animals
Showing ornate shell-shaped, floral and leaf patterns, and figures Showing ornate shell-shaped, floral and leaf patterns, and figures
Showing ornate interwoven leaf and stem patterns Showing ornate interwoven leaf and stem patterns
Larva, pupa, and adult of a Leaf Beetle Larva, pupa, and adult of a Leaf Beetle
258. Leaf-hopper of the Vine 258. Leaf-hopper of the Vine

Webster's Revised Unabridged Dictionary
  • Interesting fact: In the Pacific Islands when people get burns they often use a banana leaf as treatment
    • Leaf (Bot) A colored, usually green, expansion growing from the side of a stem or rootstock, in which the sap for the use of the plant is elaborated under the influence of light; one of the parts of a plant which collectively constitute its foliage.
    • Leaf A part of a book or folded sheet containing two pages upon its opposite sides.
    • Leaf A portion of fat lying in a separate fold or layer.
    • Leaf A side, division, or part, that slides or is hinged, as of window shutters, folding doors, etc.
    • Leaf (Bot) A special organ of vegetation in the form of a lateral outgrowth from the stem, whether appearing as a part of the foliage, or as a cotyledon, a scale, a bract, a spine, or a tendril.
    • Leaf A very thin plate; as, gold leaf .
    • Leaf One of the teeth of a pinion, especially when small.
    • Leaf Something which is like a leaf in being wide and thin and having a flat surface, or in being attached to a larger body by one edge or end;
    • Leaf The movable side of a table.
    • v. i Leaf lēf To shoot out leaves; to produce leaves; to leave; as, the trees leaf in May.
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: In the Andes, time is sometimes measured by how long it takes to chew a quid of coca leaf.
    • n leaf An expanded, usually green, organ of a plant, of transient duration, produced laterally from a stem or branch, and, with others, arranged upon the stem in a definite and symmetrical order. In the most complete sense, a leaf consists of a blade or lamina, the broad, flat portion; a footstalk, leafstalk, or petiole, the linear portion connecting the blade with the stem; and a pair of appendages, the stipules, at the base of the petiole: but often the petiole, and still more often the stipules, are wanting. In any case, leaf very frequently denotes merely the blade, especially with descriptives: as, a cordate, an ovate, a lanceolate leaf, etc. Leaves are simple or compound, according as they have one or several blades. They are distinguished also by the arrangement of their veins. (See nervation.) Physiologically, the normal function of leaves is assimilation—that is, the transformation of inorganic into organic matter, which takes place only in the green parts of the plant. But leaves may be converted to various other uses—for example, into means for the capture and maceration of insects, as in sundew and Venus's fly-trap, or into organs for climbing, as in the pea-vine; and in many other ways leaves depart from the typical description above given.
    • n leaf Anything resembling a leaf, as in being flat and relatively broad, or in being a flexible or movable attachment or addition to something else. A single thickness of paper in a book or folded sheet; hence, with reference to the words written or printed upon it, the part of a book contained in one of such leaves.
    • n leaf A separately movable division of a folding or sliding door, fire-screen, table, hinge, etc.
    • n leaf A very thin sheet of hammered metal; foil: as, gold- leaf.
    • n leaf A portion of fat lying in a separate fold or layer; especially, the fat about the kidneys of a pig (compare leaf-lard); hence, in local use, the kidney itself.
    • n leaf A tooth of a pinion, especially when the pinion is small.
    • n leaf In architecture, an ornament resembling or representing a leaf of a plant; a foliation.
    • n leaf A flap, as of a hat.
    • n leaf In tapestry-weaving, one half the threads of the warp. As a preliminary to working a tapestry these leaves are separated, one being brought nearer the workman and the other left in the background.
    • n leaf In zoology, a leaf-like part or organ. See noseleaf, and compare leaflet, 4.
    • n leaf A distemper in young lambs caused by feeding on leaves
    • leaf To shoot out leaves; produce foliage: as, the trees leaf in May. Also leave.
    • ***
Chambers's Twentieth Century Dictionary
  • Interesting fact: When pure gold is beaten with a mallet and made into gold leaf, the average thickness runs between 1/200,000th to 1/250,000th of an inch.
    • n Leaf lēf one of the lateral organs developed from the stem or axis of the plant below its growing-point: anything beaten thin like a leaf: two pages of a book: one side of a window-shutter, &c.
    • v.i Leaf to shoot out or produce leaves:—pr.p. leaf′ing; pa.p. leafed
    • ***

Quotations

  • Florence King
    Florence%20King
    “Chinks in America's egalitarian armor are not hard to find. Democracy is the fig leaf of elitism.”
  • Martin Luther
    Martin%20Luther
    “Our Lord has written the promise of resurrection, not in books alone, but in every leaf in springtime.”
  • Bhagavad Gita
    Bhagavad Gita
    “Whatever I am offered in devotion with a pure heart -- a leaf, a flower, fruit, or water -- I accept with joy.”
  • Susan Coolidge
    Susan Coolidge
    “Slow buds the pink dawn like a rose From out night's gray and cloudy sheath; Softly and still it grows and grows, Petal by petal, leaf by leaf.”
  • William Hogarth
    William Hogarth
    “You know I won't turn over a new leaf I am so obstinate, but then I am no less obstinate in being your affectionate Husband.”
  • Henry David Thoreau
    Henry%20David%20Thoreau
    “We are armed with language adequate to describe each leaf of the filed, but not to describe human character.”

Idioms

Take a leaf out of someone's book - If you take a leaf out of someone's book, you copy something they do because it will help you.
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Turn a new leaf - If someone turns a new leaf, they change their behaviour and stop doing wrong or bad things.
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Etymology

Webster's Revised Unabridged Dictionary
OE. leef, lef, leaf, AS. leáf,; akin to S. lōf, OFries. laf, D. loof, foliage, G. laub, OHG. loub, leaf, foliage, Icel. lauf, Sw. löf, Dan. löv, Goth. laufs,; cf. Lith. lapas,. Cf. Lodge

Usage

In literature:

Eating and breathing, the plant continues to grow, leaf after leaf unfolding.
"The Renewal of Life; How and When to Tell the Story to the Young" by Margaret Warner Morley
A very pretty amusement, especially for those who have just completed the study of botany, is the taking of leaf photographs.
"The Ladies Book of Useful Information" by Anonymous
It all comes from the leaf of this Philippine palm.
"Fil and Filippa" by John Stuart Thomson
It grows in leaf mould in the woods and has been found at Ithaca, N. Y., twice during July and September, 1897.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc." by George Francis Atkinson
For silver tooling aluminium leaf may be used, as silver leaf tarnishes very quickly.
"Bookbinding, and the Care of Books" by Douglas Cockerell
This bottle contains nitric acid; I shall pour some of it over this piece of copper-leaf .
"Conversations on Chemistry, V. 1-2" by Jane Marcet
Leaf for leaf, the wise man read it through: every man may read in this book, but only by fragments.
"What the Moon Saw: and Other Tales" by Hans Christian Andersen
Midrib of the leaf couched silver.
"Art in Needlework" by Lewis F. Day
Wash some parsley very clean, and pick it carefully leaf by leaf.
"The Cook and Housekeeper's Complete and Universal Dictionary; Including a System of Modern Cookery, in all Its Various Branches," by Mary Eaton
A green cutting is usually cut with two buds with the leaf at the upper one left on.
"Manual of American Grape-Growing" by U. P. Hedrick
So by noting the position of the buds, all the parts included in a single leaf can be determined.
"Trees of the Northern United States" by Austin C. Apgar
Many persons say they will each seize a leaf in their beaks and then turn over on their backs.
"The Industries of Animals" by Frédéric Houssay
When the palm leaf is used, it is generally decorated with a smaller leaf of a different hue.
"Rugs: Oriental and Occidental, Antique & Modern" by Rosa Belle Holt
With only two species of our trees known to me might the swelling bud push off the old leaf.
"Ways of Nature" by John Burroughs
The teeth pass through the leaf into a groove underneath.
"Philippine Mats" by Hugo H. Miller
After her father's death Anne had been for a time passive, swept away by grief as a dead leaf on the wind.
"Anne" by Constance Fenimore Woolson
And the girl by the door, where she had clung like a leaf blown there by a wind of grief, came up to him.
"Fairfax and His Pride" by Marie Van Vorst
When they reached the cliff, every serpent bit off a leaf from a plant that was growing there.
"The Shoemaker's Apron" by Parker Fillmore
One, now in the Cologne Museum, was made of steel with a square handle and blade of myrtle leaf shape.
"Bloodletting Instruments in the National Museum of History and Technology" by Audrey Davis
There is in the plan of "The Floure and the Leaf," a peculiarity which is not easily accounted for.
"Blackwood's Edinburgh Magazine, Volume 57, No. 355, May 1845" by Various
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In poetry:

Brother, my thought of you
In this letter on a palm-leaf
Goes up about you
As her own scent
Goes up about the rose.
"Disquiet" by Edward Powys Mathers
Lo! how the Heavens ponder now,
They look so still and moody!
And every leaf, and every bough,
Are in a dark deep study.
"The Thunder Storm" by Albery Allson Whitman
He turned himself straight round about,
To look to the leaf of the tree,
So swift as May Colven was
To throw him in the sea.
"May Colven" by Andrew Lang
WAN-VISAGED thing! thy virgin leaf
To me looks more than deadly pale,
Unknowing what may stain thee yet,--
A poem or a tale.
"To A Blank Sheet Of Paper" by Oliver Wendell Holmes
Singing grief with every leaf.
Sadder grief with sadder leaf,
Sweeter leaf with sweeter grief,
So't was sung in a dark tongue.
"The German Legion" by Sydney Thompson Dobell
The breeze so softly blew it made
No forest leaf to quiver,
And the smoke of the random cannonade
Rolled slowly from the river.
"Music In Camp" by John Reuben Thompson

In news:

CLEMSON UNIVERSITY — A Clemson University Extension agent in Lexington County has identified the first eucalyptus leaf beetle discovered in South Carolina.
Next year, two new vehicles, the Nissan Leaf and the Chevy Volt will start to become available in quantity to Florida drivers.
The stem of each leaf — a plant part technically called a petiole — is longer than the leaf itself, allowing the leaf to pivot.
Maple Leafs farm team adopts You Can Play pledge.
Leafs farmhand Keith Aucoin victim of lockout's 'trickle-down' effect: Cox.
A Wild, Fearsome World Under Each Fallen Leaf.
Sean Tehrani, executive chef and proprietor of Basil Leaf Café, demonstrates several recipes from the café featuring basil.
With current growth stages ranging from Feekes 6 to 8, wheat growers in the Midwest need to be on the look out for the presence of nodes and the emergence of flag leaf.
What can I use to control leaf- footed bugs on tomatoes.
Leaf- footed bugs are damaging to tomato fruit due to their piercing-sucking mouthparts.
A Nissan Leaf charges at a electric vehicle charging station Thursday, Aug 18, in Portland, Ore.
2011 Nissan Leaf Buyer's Guide.
Maple Leafs' season to forget ends in funereal gloom.
Running, Eating, Beer And A Little Leaf Change.
Recipe might be right for colorful leaf season.
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In science:

If the isotopy is closed, i.e. ψ1 = id, given a leaf N of F , it is easy to show the existence of a constant κ such that τ1|N = κτ|N for all τ ∈ QF .
Hamiltonian symplectomorphisms and the Berry phase
If N is a leaf of F and τ|N 6= 0 by Lemma 4 Tψ (τ )|N = κτ|N , where κ is a constant.
Hamiltonian symplectomorphisms and the Berry phase
Moreover if N is a leaf of B , then Nt = ψt (N ) is a leaf of Bt .
Hamiltonian symplectomorphisms and the Berry phase
Let us take τ ∈ QF with τ|N 6= 0, for N a leaf of a Lagrangian foliation F .
Hamiltonian symplectomorphisms and the Berry phase
In the thermodynamic limit of an infinite random graph, we compute analytically the dynamics of leaf removal, the number of isolated vertices and the number of vertices and edges in the core.
Core percolation in random graphs: a critical phenomena analysis
When α < 1, the remnant after leaf removal is made of O(N ) isolated vertices, plus a subgraph of size o(N ) without leaves.
Core percolation in random graphs: a critical phenomena analysis
Obviously, each tree shrinks to a single isolated point after leaf removal.
Core percolation in random graphs: a critical phenomena analysis
The matching problem had already led mathematicians to a thorough study of leaf removal (see Refs. [3, 4] and references therein).
Core percolation in random graphs: a critical phenomena analysis
In section 3 we define leaf removal, leaf removal processes obtained by iteration of leaf removals and the “core” for an arbitrary graph.
Core percolation in random graphs: a critical phenomena analysis
Leaf removal: If (v , w) is a leaf of G, and G′ the subgraph of G induced by V \{v , w}, we say that G′ is obtained from G by leaf removal of (v , w).
Core percolation in random graphs: a critical phenomena analysis
It implies that the global leaf removal process leads to same core and number of isolated points as any step by step leaf removal process.
Core percolation in random graphs: a critical phenomena analysis
The global leaf removal process allows to compute the most salient characteristics of the leaf removal process, the functions i(α), c(α) and l(α).
Core percolation in random graphs: a critical phenomena analysis
The leaf removal process is done leaf by leaf.
Core percolation in random graphs: a critical phenomena analysis
We move ς into a regular leaf starting at the leaf determined by λ at p.
Codimension one symplectic foliations
That is, although we are only interested in leafs, we still have to skip all other constructors to reach leafs.
Typed Generic Traversal With Term Rewriting Strategies
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