Definition of melaphyre in English:

melaphyre

(also melaphire, melaphyr)

noun

Geology
  • Any of various dark-coloured porphyritic (especially basaltic) rocks. Later: specifically an altered basalt, especially of Carboniferous or Permian age.

Origin

Early 19th century; earliest use found in Henry Thomas De la Beche (1796–1855), geologist. From French mélaphyre from ancient Greek μέλας black + -phyre (in porphyre).

Pronunciation

melaphyre

/ˈmɛləfʌɪə/