| 释义 |
perlitic
per·lite also pearl·ite P0136300 (pûr′līt′)n. A natural volcanic glass similar to obsidian but having distinctive concentric cracks and a relatively high water content. In a fluffy heat-expanded form perlite is used as a lightweight aggregate, in fire-resistant insulation, and in soil for potted plants.
[French (from perle, pearl, from Old French; see pearl1) or German Perlit (from Perle, pearl, ultimately from Vulgar Latin *pernula).]
per·lit′ic (pər-lĭt′ĭk) adj.
perlitic
perlitic[¦pər¦lid·ik] (petrology) Of the texture of a glassy igneous rock, exhibiting small spheruloids formed from cracks due to contraction during cooling. Pertaining to or characteristic of perlite. perliticSaid of a material having a structure similar to that of perlite. |