(of a crystal) that is a composite consisting of two (or sometimes more) parts which are reversed in orientation with respect to each other (typically by reflection in a particular plane)
（晶体）孪晶的
cerrusite, pseudo-hexagonal crystals, usually twinned
a mass of twinned crystals
Example sentencesExamples
Although the quartz encrustation protects the calcite from dissolving, it obscures the twinned nature of the crystals, which is revealed by mechanical removal of the crust.
A variety of large twinned crystal forms of gypsum grow on the floors of evaporating lagoons and lakes including fans and needles.
These differential stress conditions are further supported by the small size of both recrystallized and twinned calcite grains.
When viewed in thin section, it is clear that the ‘massive’ material is composed of an intergrowth of complexly twinned crystals.
The one notable exception to this is the Boltsburn mine, which produced twinned fluorite crystals of good clarity in excess of 10 cm on edge.
Definition of twinned in US English:
twinned
adjectivetwind
(of a crystal) that is a composite consisting of two (or sometimes more) parts which are reversed in orientation with respect to each other (typically by reflection in a particular plane)
（晶体）孪晶的
cerrusite, pseudo-hexagonal crystals, usually twinned
a mass of twinned crystals
Example sentencesExamples
The one notable exception to this is the Boltsburn mine, which produced twinned fluorite crystals of good clarity in excess of 10 cm on edge.
These differential stress conditions are further supported by the small size of both recrystallized and twinned calcite grains.
When viewed in thin section, it is clear that the ‘massive’ material is composed of an intergrowth of complexly twinned crystals.
Although the quartz encrustation protects the calcite from dissolving, it obscures the twinned nature of the crystals, which is revealed by mechanical removal of the crust.
A variety of large twinned crystal forms of gypsum grow on the floors of evaporating lagoons and lakes including fans and needles.