The Collaborative International Dictionary of English v.0.48:
Antedon \Antedon\ prop. n. A genus formerly called genus Comatula. Syn: genus Antedon [WordNet 1.5]WordNet (r) 3.0 (2006):
Antedon n 1: a genus of echinoderms of the family Antedonidae [syn: Antedon, genus Antedon]