\Ac`ti*na"ri*a\, n. pl. [NL., from Gr. ?, ?, ray.]
(Zo["o]l.)
A large division of Anthozoa, including those which have
simple tentacles and do not form stony corals. Sometimes, in
a wider sense, applied to all the Anthozoa, expert the
Alcyonaria, whether forming corals or not.