SEROUS Meaning of SEROUS in English [ 'sɪərəs ]■ adjective Physiology relating to, resembling, or producing serum.Derivativesserosity noun OriginME: from Fr. séreux or med. L. serosus , from serum (see serum ). Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004