Hemitrope \Hem"i*trope\, a. [Hemi- + Gr. ? to turn: cf. F. h['e]mitrope.] Half turned round; half inverted; (Crystallog.) having a twinned structure. [1913 Webster]
Hemitrope \Hem"i*trope\, n. That which is hemitropal in construction; (Crystallog.) a twin crystal having a hemitropal structure. [1913 Webster]