Definition of pumpellyite in English:

pumpellyite

noun

Mineralogy
  • A mineral, or group of minerals resembling epidote in structure, which occur as colourless, greenish, or brown crystals and are characteristic of some low-grade metamorphic rocks.

Origin

1920s. From the name of Raphael Pumpelly, U.S. geologist + -ite.

Pronunciation

pumpellyite

/pʌmˈpɛlɪʌɪt/