Definition of pharmacolite in US English:

pharmacolite

noun

Mineralogy
  • A mineral of the monoclinic crystal system consisting of a hydrated calcium arsenate, CaHAsO₄.2H₂O, and usually occurring as white or greyish silky fibres.

Origin

Early 19th century. From pharmaco- + -lite, after German Pharmakolith.

Pronunciation

pharmacolite

/ˈfɑːməkəlʌɪt/