Definition of "feldspath" [feldspath]

• Alternative form of feldspar. (noun)

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• "Our path, on setting out, lay along a narrow passage between rocks of granite, quartz, and feldspath; the direction north."
• "Near the opening of the mountain, where the water is found, at some distance below the highest summit, I found the rock to be porphyry of a light reddish colour, close grained, with small veins of feldspath, much resembling the porphyry I saw last year, in Wady Lamoule, beyond the Second"
• "I saw only a few specimens of green porphyry, with red slabs of feldspath; the greatest part being red porphyry, and porphyry schist."