from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A dark igneous porphyry embedded with feldspar crystals.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of several dark augitic eruptive rocks allied to basalt.
from the GNU version of the Collaborative International Dictionary of English
- n. Any one of several dark-colored augitic, eruptive rocks allied to basalt.
from The Century Dictionary and Cyclopedia
- n. A fine-grained greenish- or brownish-black aggregate of plagioclase, augite, olivin, magnetite, or titaniferous iron and some chloritic mineral, usually delessite.
- n. It is proposed, in the field classification accompanying the quantitative system of classification of igneous rocks (see rock), to restore the term melaphyre to its early significance and apply it to all dark-colored porphyries, of any composition.
French mélaphyre : Greek melās, black + French porphyre, porphyry (from Medieval Latin porphyrium; see porphyry).(American Heritage® Dictionary of the English Language, Fourth Edition)
French, from Ancient Greek, meaning "black porphyry". (Wiktionary)