Source : Webster's Revised Unabridged Dictionary (1913)

Actinaria \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.

Anthozoa \An`tho*zo"a\, n. pl. [NL., fr. Gr. 'a`nqos flower + ?
   animal.] (Zo["o]l.)
   The class of the C[oe]lenterata which includes the corals and
   sea anemones. The three principal groups or orders are
   {Acyonaria}, {Actinaria}, and {Madreporaria}.

Source : WordNet®

Actinaria
     n : sea anemones [syn: {Actiniaria}, {order Actiniaria}, {order
         Actinaria}]