noun
- Plural of anorthite; a calcium aluminum silicate mineral of the plagioclase feldspar group, typically white or colorless.
Usage: technical; mineralogy
Examples
- Anorthites are commonly found in igneous rocks and lunar samples.
- The geologist identified anorthites in the feldspar composition of the granite specimen.
- Anorthites make up a significant portion of the plagioclase feldspar series.
- The moon's highlands contain abundant anorthites, making them lighter in color than the basaltic lowlands.