Definition of prochlorite in US English:

prochlorite

noun

Mineralogy
  • A mineral now recognized as a ferroan variety of clinochlore.

Origin

Mid 19th century; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher. From pro- + chlorite, so called with reference to this being the earliest variety of chlorite that was distinguished.

Pronunciation

prochlorite

/prəʊˈklɔːrʌɪt/