01 n. The assemblage of two or more crystals, or parts of crystals, in reversed position with reference to each other in accordance with some def…
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1.
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.(Crystallog.)
Phrases & compounds
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.