from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A borosilicate of lime commonly occurring in glassy, greenish crystals, with the chemical formula CaBSiO4(OH).
from the GNU version of the Collaborative International Dictionary of English
- n. A borosilicate of lime commonly occuring in glassy,, greenish crystals.
from The Century Dictionary and Cyclopedia
- n. A borosilicate of calcium, occurring most commonly in brilliant glassy crystals, which are colorless or of a pale-green tint, white, grayish, or red; also in a white, opaque, massive form, looking like porcelain, and in radiated columnar form with botryoidal surface (the variety botryolite).
The element boron is present in various complex boro-silicates, such as datolite and tourmaline, the latter of which is used as a precious stone