Definition of pyrostilpnite in English:

pyrostilpnite

noun

Mineralogy
  • A mineral which is a sulphide of silver and antimony, occurring as orange-red tabular or needle-like crystals; also called fire-blende.

Origin

Mid 19th century; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher. From pyro- + ancient Greek στιλπνός shining + -ite.