Definition of miagite in US English:

miagite

noun

Geology
rare
  • An orbicular gabbro.

Origin

Early 19th century; earliest use found in John Pinkerton (1758–1826), historian and poet. From Miage, the name of a glacier near Mont Blanc where the rock was first discovered by H. B. de Saussure + -ite.

Pronunciation

miagite

/ˈmʌɪədʒʌɪt/