• WordNet 3.6
    • n petiole the slender stem that supports the blade of a leaf
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Webster's Revised Unabridged Dictionary
    • Petiole (Bot) A leafstalk; the footstalk of a leaf, connecting the blade with the stem. See Illust. of Leaf.
    • Petiole (Zoöl) A stalk or peduncle.
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Century Dictionary and Cyclopedia
    • n petiole In botany, a leafstalk; the stalk or support by which the blade or limb of a leaf is attached to the stem. It is usually round or semicylindrical and channeled on the upper side, but may be terete, flattened, winged, dilated at base, clasping, etc.
    • n petiole In entomology, the slender sclerite or sclerites by which the abdomen of many insects is united to the thorax. It is prominent in many Hymenoptera, as the slender part of a wasp; it is usually one-jointed, but sometimes two-jointed, and rarely three-jointed. In certain ants it carries one or more swellings which are important in classification. See cuts under Evaniidæ and Atta.
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Chambers's Twentieth Century Dictionary
    • n Petiole pet′i-ōl the stalk which joins a leaf to the twig or branch: a footstalk—also Petī′olus
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Webster's Revised Unabridged Dictionary
F. pétiole, fr. L. petiolus, a little foot, a fruit stalk; cf. pes, pedis, a foot
Chambers's Twentieth Century Dictionary
Fr.,—L. petiolus, a little foot—pes, pedis, a foot.


In literature:

The whole tree is quite glabrous except the petioles, which are clothed with a dense pubescence.
"Hardy Ornamental Flowering Trees and Shrubs" by A. D. Webster
The first segment of abdomen has the petiole black.
"Three Expeditions into the Interior of Eastern Australia, Vol 1 (of 2)" by Thomas Mitchell
Leaves oval, from seven to ten inches long, and six or seven inches broad, produced on long petioles.
"The Field and Garden Vegetables of America" by Fearing Burr
Each of these is inserted on the petiole by means of pulvinule.
"Sir Jagadis Chunder Bose" by Sir Jagadis Chunder Bose
Yellow filaments of some length hung in a cluster where the petiole of the leaves met.
"Across Unknown South America" by Arnold Henry Savage Landor
Petioles of the 3 lower compound leaves less than 1 cm.
"Northern Nut Growers Association Thirty-Fourth Annual Report 1943" by Various
Trim bud sticks to leave an inch of petiole on the bud.
"Northern Nut Growers Association Report of the Proceedings at the Thirty-Eighth Annual Meeting" by Northern Nut Growers Association
Post-petiole: in Hymenoptera, that part of abdomen behind petiole.
"Explanation of Terms Used in Entomology" by John. B. Smith
Base has a heart-shaped notch; petiole long and slender, usually red.
"Ontario Teachers' Manuals: Nature Study" by Ontario Ministry of Education
The leaves are alternate, veined and petiolated, that is, they have a leaf stalk connecting leaf and stem.
"The Story of the Cotton Plant" by Frederick Wilkinson

In news:

The stem of each leaf — a plant part technically called a petiole — is longer than the leaf itself, allowing the leaf to pivot.