cleiˈstogenous,a.Bot. [f.Gr. κλειστός (seeprec.) + L. -gen-us born, bearing + -ous.] Bearing cleistogamous flowers; see prec. So also ˈcleistogenea. 1876Darwin Cross-fertil. i. 3 Plants called cleistogene, which bear on the same stock two kinds of flowers.