different between igneous vs allotriomorph

English

From Latin igneus (“fiery”).

igneous (not comparable)

Pertaining to or having the nature of fire; containing fire; resembling fire.
(geology) Resulting from, or produced by, great heat. With rocks, it could also mean formed from lava or magma.

Classical compound, Ancient Greek ????????? (allótrios, “foreign”) +? -morph.

allotriomorph (plural allotriomorphs)

(geology) A mineral that did not develop its otherwise typical external crystal form because of late crystallization between earlier formed crystals, typical of matrix minerals in rapidly crystallizing volcanic lavas and shallow igneous intrusions.

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