Definition of parsonsite in US English:

parsonsite

noun

Mineralogy
  • A hydrated triclinic phosphate of lead and uranium, Pb₂(UO₂)(PO₄)₂·2H₂O, occurring as crusts and powdery aggregates of transparent or translucent, minute, lath-like crystals.

Origin

1920s; earliest use found in Chemical Abstracts. From French parsonsite from the name of Arthur Leonard Parsons, Canadian mineralogist + -ite.

Pronunciation

parsonsite

/ˈpɑːs(ə)nˌzʌɪt/