DEMERSAL Meaning of DEMERSAL in English [ dɪ'mə:s(ə)l ]■ adjective (of fish) living close to the seabed.OriginC19: from L. demersus (past participle of demergere 'submerge, sink') + -al . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004