Definition of patronite in US English:

patronite

noun

Mineralogy
  • A black, lustrous, fine-grained mixture of vanadium sulphides that occurs in Peru and is exploited as a source of vanadium; (in later use) specifically the monoclinic sulphide VS₄.

Origin

Early 20th century. From the name of A. Rizo-Patron, Peruvian metallurgist + -ite.