Definition of diallage
: a dark green or bronze-colored laminated pyroxene common in certain igneous rocks (hardness 4, specific gravity 3.2–3.35)
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Origin and Etymology of diallage
French, from Greek diallagē change, from diallag-, aorist stem of diallassein to interchange, exchange, change, from dia- + allassein to change, from allos other — more at else
First Known Use: 1805
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