noun Petrology.
a fine-grained granite composed essentially of feldspar and quartz.

1875–80; apl- (variant of haplo-) + ite1

aplitic [ap-lit-ik] , adjective
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World English Dictionary
aplite or haplite (ˈæplaɪt)
a light-coloured fine-grained acid igneous rock with a sugary texture, consisting of quartz and feldspars
[C19: from German Aplit, from Greek haploos simple + -ite1]
haplite or haplite
[C19: from German Aplit, from Greek haploos simple + -ite1]
aplitic or haplite
hap'litic or haplite

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
The quartz monzonite is far more disintegrated than the aplite and almost invariably is eroded more rapidly than the aplite.
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