aquamarine n. + Add to list US //ˌɑkwəmɝˈin// UK //ˈækwɐməɹˌiːn// aqua·ma·rine SynonymsEtymology Synonyms aquaturquoiseOriginLATaqua marīna→ENaquamarine From Latin aqua marīna (“sea water”), adjective form from mare (“sea”).