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/ˈfɛldˌspɑɹ/ · noun
(mineralogy) Any of a large group of rock-forming aluminosilicate minerals containing potassium, sodium, or calcium that, together, make up about 60% of the Earth's outer crust..
Use feldspar when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Feldspar means (mineralogy) Any of a large group of rock-forming aluminosilicate minerals containing potassium, sodium, or calcium that, together, make up about 60% of the Earth's outer crust..
Common synonyms include felspar.
The opposite depends on the specific sense.
Use feldspar where its definition matches the intended context.
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