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Related to anorthitic: labradorite
A white to gray variety of plagioclase feldspar that contains a high proportion of calcium to sodium and occurs in alkaline igneous rocks such as gabbro and anorthosite.
[From Greek an-, not; see a-1 + orthos, straight (from its oblique crystals).]
an′or·thit′ic (-thĭt′ĭk) adj.
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|Adj.||1.||anorthitic - characteristic of anorthite|