\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.