pennatula

Pen*nat"u*la, n.; pl. L. Pennatulæ, E. Pennatulas. Etym: [NL., fr. L. penna a feather.] (Zoöl.) Defn: Any one of numerous species of Pennatula, Pteroides, and allied genera of Alcyonaria, having a featherlike form; a sea-pen. The zooids are situated along one edge of the side branches.

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