{ Cleis`to*gam"ic (?), Cleis*tog"a*mous (?) } a. [Gr. &?; closed (fr. &?; to shut) + ga`mos marriage.] (Bot.) Having, beside the usual flowers, other minute, closed flowers, without petals or with minute petals; -- said of certain species of plants which possess flowers of two or more kinds, the closed ones being so constituted as to insure self-fertilization. Darwin.