‖As‐cid′i‐oid″e‐a (�), n. pl. [NL., fr. ascidium + -oid. See Ascidium.] (Zoöl.) 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.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.