feldspar | (noun) any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium | Synonyms: felspar |
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felspar | (noun) any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium | Synonyms: feldspar |
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fluorspar | (noun) a soft mineral (calcium fluoride) that is fluorescent in ultraviolet light; chief source of fluorine | Synonyms: fluor, fluorite |
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spar | (noun) making the motions of attack and defense with the fists and arms; a part of training for a boxer | Synonyms: sparring |
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(noun) a stout rounded pole of wood or metal used to support rigging | - |
(noun) any of various nonmetallic minerals (calcite or feldspar) that are light in color and transparent or translucent and cleavable | - |