Hēm’i-prĭsm, n.
n. [See HEMI and PRISM.] (Crystallog.) A form, in the monoclinic and triclinic systems of crystallization, that comprises but one face of a prism and its opposite. Dana.
n. [See HEMI and PRISM.] (Crystallog.) A form, in the monoclinic and triclinic systems of crystallization, that comprises but one face of a prism and its opposite. Dana.