FOLIACEOUS Meaning of FOLIACEOUS in English [ ˌfəʊlɪ'eɪʃəs ]■ adjective1》 of or resembling a leaf or leaves. 2》 Geology consisting of thin sheets or laminae.OriginC17: from L. foliaceus (from folium 'leaf') + -ous . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004