GNU Collaborative International Dictionary of English

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Found 2 definitions

1.       
   ‖Athecata , n. pl. [NL., fr. Gr. ἀ priv. +  chest, box.] (Zool.) A division of Hydroidea in which the zooids are naked, or not inclosed in a capsule. See Tubularian.
   1913 Webster
         
       

2.       
   ‖Tubularida , n. pl. [NL.] (Zool.) An extensive division of Hydroidea; the tubularians; -- called also Athecata, Gymnoblastea, and Tubulariae.
   1913 Webster