ADSCITITIOUS Meaning of ADSCITITIOUS in English [ ˌadsɪ'tɪʃəs ]■ adjective rare additional.OriginC17: from L. adscit- , adsciscere 'admit, adopt', + -itious 2 , on the pattern of adventitious . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004