'Twinning axis' definitions:

Definition of 'Twinning axis'

From: GCIDE
  • Twinning \Twin"ning\, n. (Crystallog.) The assemblage of two or more crystals, or parts of crystals, in reversed position with reference to each other in accordance with some definite law; also, rarely, in artificial twinning (accomplished for example by pressure), the process by which this reversal is brought about. [1913 Webster]
  • Polysynthetic twinning, repeated twinning of crystal lamellae, as that of the triclinic feldspars.
  • Repeated twinning, twinning of more than two crystals, or parts of crystals.
  • Twinning axis, Twinning plane. See the Note under Twin, n. [1913 Webster]