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.
Polysynthetic twinning, repeated twinning of crystal
lamell[ae], 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.
Source: Webster's Revised Unabridged Dictionary (1913)
|