- A twin crystal having a hemitropal framework.
- what is hemitropal in building; (Crystallog.) a twin crystal having a hemitropal construction.
- something that is hemitropous in framework.
- A twin crystal.
- half-turned round; 1 / 2 inverted; (Crystallog.) having a twinned structure.
- Half-turned: specifically applied in mineralogy to a compound or double crystal which has two comparable components or halves, one of that is switched half round upon others.