(n)a large class of sedentary marine coelenterates that includes sea anemones and corals; the medusoid phase is entirely suppressed, Syn.Actinozoa, class Anthozoa, class Actinozoa
‖n. pl. [ NL., fr. Gr. 'a`nqos flower + &unr_; animal. ] (Zool.) The class of the Cœlenterata which includes the corals and sea anemones. The three principal groups or orders are Acyonaria, Actinaria, and Madreporaria. [ 1913 Webster ]