noun
- plural of pyrophyllite; soft aluminum silicate minerals used in ceramics and as heat-resistant materials
Usage: mineralogy; geology
Examples
- The ceramics factory imported high-quality pyrophyllites from North Carolina.
- Pyrophyllites are valued for their heat resistance in industrial applications.
- The geologist identified several pyrophyllites in the metamorphic rock samples.
- These pyrophyllites will be processed into refractory materials.
- The mine produces pyrophyllites used in the manufacture of electrical insulators.