gorgonianPronunciation: /gɔːˈgəʊnɪən/ ZoologyDefinition of gorgonian noun a colonial coral of an order distinguished by having a horny tree-like skeleton, including the sea fans and precious red coral. Order Gorgonacea, class Anthozoa adjective relating to gorgons or gorgonians. Origin: mid 19th century: from modern Latin Gorgonia, from Latin Gorgo (see gorgon), with reference to its petrifaction, + -angorgonian in other Oxford dictionaries Definition of gorgonian in the US English dictionary