Pronunciation: (stō'lun), [key]
1. Bot.a prostrate stem, at or just below the surface of the ground, that produces new plants from buds at its tips or nodes.
2. Zool.a rootlike extension of the body wall in a compound organism, as a bryozoan, usually giving rise to new members by budding.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.