As*cid`i*oid"e*a\, n. pl. [NL., fr. ascidium + -oid. See Ascidium.] (Zo["o]l.) A group of Tunicata, often shaped like a two-necked bottle. The group includes, social, and compound species. The gill is a netlike structure within the oral aperture. The integument is usually leathery in texture. See Illustration in Appendix.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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