noun
- plural of perlite; volcanic glasses that expand when heated, used in construction and horticulture
Usage: geology; construction
Examples
- The contractor mixed perlites into the concrete to reduce its weight.
- Gardeners often add perlites to potting soil for better drainage.
- These perlites were formed from volcanic activity millions of years ago.
- The insulation contains expanded perlites for thermal efficiency.
- Perlites help aerate the soil in greenhouse applications.
- The building materials supplier stocks various grades of perlites.