DECAHEDRON Meaning of DECAHEDRON in English [ ˌdɛkə'hi:dr(ə)n , -'hɛd- ]■ noun ( plural decahedra or ~s ) a solid figure with ten plane faces.Derivativesdecahedral adjective OriginC19: from deca- + -hedron . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004