noun
- Plural of perimorph; minerals or crystals that have the same external form but different internal crystal structures or compositions.
Usage: mineralogy; technical term; rare in general usage
Examples
- Perimorphs are studied by mineralogists to understand crystal transformation processes.
- The collection included several perimorphs that demonstrated how mineral composition can vary while maintaining identical crystal shapes.
- Geologists distinguish between perimorphs and true polymorphs based on their internal atomic arrangements.