Definition of priorite in US English:

priorite

noun

Mineralogy
  • A rare mineral of the orthorhombic crystal system consisting of an oxide and hydroxide of niobium, titanium, and yttrium (with traces of several other elements), and occurring as black or dark brown, prismatic crystals.

Origin

Early 20th century; earliest use found in Journal of the Chemical Society. From the name of G. T. Prior, British mineralogist + -ite, after German Priorit.

Pronunciation

priorite

/ˈprʌɪərʌɪt/