Actinia \Ac*tin"i*a\, n.; pl. L. {Actini[ae]}, E. {Actinias}.
[Latinized fr. Gr. ?, ?, ray.] (Zool.)
(a) An animal of the class Anthozoa, and family
{Actinid[ae]}. From a resemblance to flowers in form
and color, they are often called {animal flowers} and
{sea anemones}. [See {Polyp}.].
(b) A genus in the family {Actinid[ae]}.
[1913 Webster]