Pronunciation: (pet'ē-ōl"), [key]
1. Bot.the slender stalk by which a leaf is attached to the stem; leafstalk. See diag. under leaf.
2. Zool.a stalk or peduncle, as that connecting the abdomen and thorax in wasps.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.