The Collaborative International Dictionary of English v.0.48:
Actiniaria \Actiniaria\ n. 1. 1 the order comprising sea anemones. Syn: order Actiniaria, Actinaria, order Actinaria [WordNet 1.5]WordNet (r) 3.0 (2006):
Actiniaria n 1: sea anemones [syn: Actiniaria, order Actiniaria, Actinaria, order Actinaria]