from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A twin crystal having a hemitropal structure.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Half turned round; half inverted; (Crystallog.) having a twinned structure.
  • n. That which is hemitropal in construction; (Crystallog.) a twin crystal having a hemitropal structure.

from The Century Dictionary and Cyclopedia

  • Half-turned: specifically applied in mineralogy to a compound or twin crystal which has two similar parts or halves, one of which is turned half round upon the other.
  • n. Anything that is hemitropous in structure.
  • n. A twin crystal.


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