PENNATULA
Pennatula, genus Pennatula
(noun) type genus of the family Pennatulidae: sea pens
Source: WordNet® 3.1
Etymology
Noun
pennatula (plural pennatulas or pennatulae)
(zoology) Any of numerous species of Pennatula, Pteroides, and allied genera of Alcyonaria, having a feather-like form; a sea pen.
Source: Wiktionary
Pen*nat"u*la, n.; pl. L. Pennatulæ, E. Pennatulas. Etym: [NL., fr. L.
penna a feather.] (Zoöl.)
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition