mel·a·phyre
| \ ˈmeləˌfī(ə)r \
plural -s
Definition of melaphyre
1
: a porphyritic rock consisting of phenocrysts of feldspar in a dark groundmass
broadly
: a porphyritic igneous rock with dark-colored aphanitic groundmass and phenocrysts of various kinds
2
: a Mesozoic basalt
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Merriam-Webster unabridged
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