gorgonian UK /ɡɔːˈɡəʊ.ni.ən/US /ɡɔɹˈɡoʊ.ni.ən/adjective 2noun 1forms 3 adjective2 •Of or relating to any coral of the order Alcyonacea. •Of or relating to the mythical gorgon; terrible or repulsive. noun1 •A member of the order Alcyonacea, comprising the soft corals.Some gorgonians, living in shallow, sunlit waters, tend to be brightly coloured – gold, purple, red – and flex softly in the currents. — 2012 formsgorgonians · more gorgonian · most gorgonian