• Frontispiece: Algae
    Frontispiece: Algae
  • WordNet 3.6
    • n algae primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves
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Century Dictionary and Cyclopedia
  • Interesting fact: The sloth moves so slowly that green algae grows in the grooves of their hair
    • algae A division of thallogenous chlorophyllous cryptogams found for the most part in the sea (seaweeds) or in fresh water. They are wholly cellular, though varying exceedingly in form and size, from a single microscopic or sometimes large and branching cell, a shapeless, jelly-like mass, or mere string of articulations, to forms with trunk-like stems and membranous laminæ many feet in length. Nourishment is absorbed by the surface of the plant, never through roots. The mode of propagation varies greatly in the different orders. In many no well-defined sexual differences have been discovered, and reproduction is carried on by means of cell-division or by non-sexual spores (tetraspores, zoöspores). In the highest order there are distinct male and female organs (antheridia and oögonia). The term Algæ as used by Linnæus and early botanists included not only seaweeds, but also the Hepaticæ, Lichenes, and Characeæ. By Harvey the Algæ were divided into three groups, distinguished chiefly by their color, viz.: the olive-brown, Melanospermeæ; the red or purple, Rhodospermeæ; and the green, Chlorospermeæ. This arrangement has now become nearly obsolete. Recent authorities have proposed several different schemes of classification for the thallophytes in general, in which structure and development, as well as supposed relationship, are taken into account, and in which the Algæ are variously distributed. Substantial agreement is not yet reached, and the nomenclature for many of the groups remains in a very unsettled condition. It may, however, be said that the Algæ are now generally divided into the following orders (classes, etc., of some), viz.: Florideæ, the most highly developed, producing cystocarps after fertilization; Oösporeæ, propagating sexually by oospores; Zoosporeæ, distinguished by the conjugation of zoospores; Conjugatæ, including the diatoms, desmids, etc., in which there is a conjugation of cells; and a remainder, the Cryptophyceæ of Thuret, variously disposed of by other authors, in which there is no known sexual reproduction. Many of the Algæ are edible and nutritious, as carrageen or Irish moss, dulse, laver, etc. Many abound in gelatin, and make a fine glue or substitute for isinglass. Kelp, iodine, and bromine are products of various species. Seaweeds are also valuable as fertilizers.
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Chambers's Twentieth Century Dictionary
  • Interesting fact: Wild Flamingos are pink because they consume vast quantities of algae and brine shrimp
    • n Algae al′jē (bot.) a division of plants, embracing seaweeds.
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Chambers's Twentieth Century Dictionary
L., pl. of alga, seaweed.


In literature:

In artificially made lakes there is sometimes danger of vegetable pollution, and trouble with growth of algae.
"The Home Medical Library, Volume V (of VI)" by Various
ALGAE, retrogressive metamorphosis in, ii.
"The Variation of Animals and Plants Under Domestication, Volume II (of 2)" by Charles Darwin
Alga, San Giorgio in, 133.
"Portuguese Architecture" by Walter Crum Watson
The simplest form of vegetation is algae which grows on the sides of the tank.
"Boy Scouts Handbook" by Boy Scouts of America
We thought it might be either the outpouring of a neighbouring volcano, or the spawn of some fish, sponge, coral, or algae.
"The Last Voyage" by Lady (Annie Allnutt) Brassey
He retires to the midst of the sea-weed and algae.
"The Industries of Animals" by Frédéric Houssay
That the different forms and varieties of gonidia corresponded with parallel types of algae; 4th.
"Fungi: Their Nature and Uses" by Mordecai Cubitt Cooke
This is due to an alga that grows on the ice.
"Farthest North" by Fridtjof Nansen
The progress, so far as it is physical, can be traced from the lowest blue-green algae right up to man.
"God and the World" by Arthur W. Robinson
Certain algae, which grow normally in water at a temperature of 20 deg.
"The Chemistry of Plant Life" by Roscoe Wilfred Thatcher
There were also deep green algae actually growing.
"Unexplored!" by Allen Chaffee
DESMIDIA'CEAE, or DESMIDIE'AE, a family of microscopic, fresh-water Green Algae, group Conjugatae.
"The New Gresham Encyclopedia" by Various
ECTOCARPACEAE, a family of Brown Algae, section Phaeosporeae.
"The New Gresham Encyclopedia" by Various
With the exception of a few obscure algae, all the fossils thus far discovered are marine invertebrates.
"North America" by Israel C. Russell
WEST and ANNANDALE, "Descriptions of Three Species of Algae associated with Indian Freshwater Polyzoa," J.
"Freshwater Sponges, Hydroids & Polyzoa" by Nelson Annandale
No algae or other small life was detected in the water between the ice crevices.
"My Attainment of the Pole" by Frederick A. Cook
Alga-like fungi with unicellular thallus and well-marked sexual organs.
"Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3" by Various
Whichever way the eye is turned it encounters submarine grottoes of fantastic shape, decorated with imitations of algae.
"The Jenolan Caves" by Samuel Cook
Stones with green algae on should be selected, for algae are the food of the tadpoles.
"Elementary Zoology, Second Edition" by Vernon L. Kellogg
At Carlsbad oolitic limestones are forming, but it seems probable that minute algae assist in this process.
"Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 6" by Various

In poetry:

El estanque tiene suelta
su cabellera de algas
y al aire sus grises tetas
estremecidas de ranas.
"Nocturnos De La Ventana" by Federico Garcia Lorca
Could such a mediocre
Fisherman harvest? I think not!
The sea at Ise
Sends waves high upon the shore
Where the algae grows!
"Could such a mediocre Fisherman" by Ise

In news:

An alga from the genus Closterium.
Warming ocean water has devastating effects on coral reefs, causing coral to bleach by expelling their symbiotic algae.
Battling 'Red Tide,' Scientists Map Toxic Algae To Prevent Shellfish Poisoning.
Colorado, Utah and Wyoming have rich reserves of oil shale , a rock containing fossilized algae that must be heated or dissolved before releasing a petroleum-like liquid.
Stream bank corrosion contributes to blue-green algae.
For years scientists have been studying and battling the introduction of phosphorous into Lake Champlain which is the primary cause of toxic blue green algae.
COLUMBUS, Ohio — State officials warn that Lake Erie has its worst toxic algae ever and say fish and tourism are threatened.
Phycobilins function as light-harvesting pigments in most cyanobacteria and red algae.
Steven Levy on Google, bugs found in herbivore guts for use in biofuel production, and a video about using algae to boost water quality.
According to the Minnesota Department of Natural Resources, once grass clippings begin to decay in lakes and streams they release phosphorous and other nutrients that increase algae growth.
A Wisconsin Public Radio report said about two miles of coastline from Cornucopia to the Apostle Islands sea caves had a light coating of blue-green algae.
A Wisconsin Public Radio report says about two miles of coastline from Cornucopia to the Apostle Islands sea caves had a light coating of blue-green algae.
Scalable Algae Created to Substitute for Petroleum Products.
A NASA-backed experiment harvests algae for oil, releases fresh water.
All algae produce natural oils.

In science:

Koike: “New feature of delayed luminescence: preil lumination-induced concavity and convexity in delayed luminescence decay curve in the green alga Pseudokirchneriel la subcapitata”, J.
Experimental proposal for testing the Emergence of Environment Induced (EIN) Classical Selection rules with Biological Systems
Here, we investigate dispersal properties of the micro-alga Chlamydomonas Reinhardtii, by means of microscopy and cell tracking.
The random walk of a low-Reynolds-number swimmer
CR is a 10µm motile bi-flagellated unicellular alga.
The random walk of a low-Reynolds-number swimmer
By varying the viscosity of the medium, we were able to draw some conclusions about the effects of friction forces on the locomotion of microorganisms such as this micro-alga.
The random walk of a low-Reynolds-number swimmer
Collini E.,Wong, C., Y., Wilk ., K.E.,Curmi , P.M.G., Brurner, P., Scholes G.,D., 2010, Coherently wired light harvesting in photosynthetic marine algae at ambient temperature, Nature 463 , 644-648.
Randomness and Multi-level Interactions in Biology
Coherently wired light-harvesting in photosynthetic marine algae at ambient temperature.
Environment-assisted quantum transport in ordered systems
Coherently wired light-harvesting in photosynthetic marine algae at ambient temperature.
Non-classicality of molecular vibrations activating electronic dynamics at room temperature
Coherent vibronic coupling in light-harvesting complexes from photosynthetic marine algae.
Non-classicality of molecular vibrations activating electronic dynamics at room temperature
The fundamental role of quantized vibrations in coherent light harvesting by cryptophyte algae.
Non-classicality of molecular vibrations activating electronic dynamics at room temperature
Our world is filled with swimming microorganisms: The spermatozoon that fuse with the ovum during fertilization, the bacteria that inhabit our guts, the protozoa in our ponds, and the algae in the ocean.
The hydrodynamics of swimming microorganisms
Chlamydomonas reinhardtii is an algae with two flagella that can exhibit both ciliary and flagellar beat patterns (Fig. 1g).
The hydrodynamics of swimming microorganisms
When exposed to bright light, the alga swims in reverse, with its two flagella extended and propagating bending waves away from the cell body as in the case of sperm cells described above .
The hydrodynamics of swimming microorganisms
Cells with p < 0 are called “pullers,” the prototypical example of which is the alga Chlamydomonas (see also the artificial swimmer in Ref. [172]).
The hydrodynamics of swimming microorganisms