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Dictionary

as•cid•i•an

Pronunciation: (u-sid'ē-un), [key] Zool.

—n.
any solitary or colonial tunicate of the class Ascidiacea, exhibiting in the larval stage the vertebrate characteristics of a notocord and hollow nerve cord.

—adj.
belonging or pertaining to the class Ascidiacea.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

asci

ascidium

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