- Rhomb-spar, a mineral crystallizing in rhombohedrons. This is the same as dolomite, or carbonate of calcium and magnesium.
- a light colored mineral composed of calcium magnesium carbonate; a source of magnesium; utilized as a ceramic and also as fertilizer
- a standard name of dolomite; -- so called because it contains magnesia, the soluble salts of which tend to be sour. See dolomite.
- Definition for "bitter spar"
- Hypernym for "bitter spar"
- Variant for "bitter spar"