/ Thesaurus / H Synonyms of hydrodamalis gigas Find synonyms for: Noun1. Steller's sea cow, Hydrodamalis gigas, sea cow, sirenian mammal, sirenianusage: extinct large sirenian mammal formerly found near the Asiatic coast of the Bering SeaWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language