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Related to Petiole (botany): petiolule, midrib, stipule


A broad, flat petiole that replaces the blade of a foliage leaf.
(invertebrate zoology)
A petal-shaped group of ambulacra near the mouth of certain echinoderms.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a petiole that is broadened in the shape of a leaf and fulfills the functions of the leaf blade, which is absent or partially reduced. Phyllodes are present in many Australian acacias and in some Australian cassias. Phyllodes characterize a number of plants that grow in the USSR, including Lathyrus missolia. Phyllodes apparently serve as an adaptation to a decrease in transpiration.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.