any of the solitary or colonial sessile marine coelenterates of the class Anthozoa, including the corals, sea anemones, and sea pens, in which the body is in the form of a polyp
adjective
2. Also: actinozoan
of or relating to the class Anthozoa
anthozoan in American English
(ˌænθəˈzoʊən)
noun
1.
any of a class (Anthozoa) of sessile saltwater cnidarians with a dominant polyp stage, including corals, sea anemones, and gorgonians; actinozoan