Entry 2 senses · 2 variants Webster, 1913 Hemitrope · Hem·i·trope · IPA a. n. 01 a. Half turned round; half inverted; (Crystallog.) having a twinned structure. 1. Half turned round; half inverted; (Crystallog.) having a twinned structure.(Crystallog.) 02 n. That which is hemitropal in construction; (Crystallog.) a twin crystal having a hemitropal structure. 1. That which is hemitropal in construction; (Crystallog.) a twin crystal having a hemitropal structure.(Crystallog.)