ADNEXA Meaning of ADNEXA in English [ ad'nɛksə ]■ plural noun Anatomy the parts adjoining an organ.Derivatives~l adjective OriginC19: L., neut. plural of adnexus 'joined', from adnectere 'fasten to'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004