‖Ath′e‐ca″ta (�), n. pl. [NL., fr. Gr. ἀ priv. + � chest, box.] (Zoöl.) A division of Hydroidea in which the zooids are naked, or not inclosed in a capsule. See Tubularian.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.