‖n.; pl. L. Actiniæ E. Actinias [ Latinized fr. Gr. &unr_;, &unr_;, ray. ] (Zool.) (a) An animal of the class Anthozoa, and family Actinidæ. 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 Actinidæ. [ 1913 Webster ]