||Pen*nat"u*la (?), n.; pl. L. PennatulÊ (#), E. Pennatulas (#). [NL.,
||fr. L. penna a feather.] (Zoˆl.) 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.
||Pen*nat`u*la"ce*a (?), n. pl. [NL. See Pennatula.] (Zoˆl.) A division
||of alcyonoid corals, including the seapens and related kinds. They
||are able to move about by means of the hollow muscular peduncle,
||which also serves to support them upright in the mud. See Pennatula,
||and Illust. under Alcyonaria.