| 释义 |
per·lite
\ˈpərˌlīt\ noun
(-s)
Etymology: French, from perle pearl + -ite — more at pearl
: volcanic glass that has a concentric shelly structure, appears as if composed of concretions, is usually grayish and sometimes spherulitic, and when expanded by heat forms insulating material and a lightweight aggregate used especially in concrete and plaster |