from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A yellow, white, or colorless crystalline mineral of barium sulfate, BaSO4, that is used in paint and as the chief source of barium chemicals. Also called heavy spar.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A mineral, barium sulphate, with the chemical formula BaSO4.
from the GNU version of the Collaborative International Dictionary of English
- n. Native sulphate of barium, a mineral occurring in transparent, colorless, white to yellow crystals (generally tabular), also in granular form, and in compact massive forms resembling marble. It has a high specific gravity, and hence is often called heavy spar. It is a common mineral in metallic veins.
from The Century Dictionary and Cyclopedia
- n. Native barium sulphate: also called barytes and heavy-spar, because of its high specific gravity.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a white or colorless mineral (BaSO4); the main source of barium
Greek barus, heavy; see gwerə-1 in Indo-European roots + -ite1.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek βἀρος (baros, "weight"), βαρύτης (barytes, "weight"). (Wiktionary)