Definition of palmierite in US English:

palmierite

noun

Mineralogy
  • A trigonal sulphate of potassium and lead, K₂Pb(SO₄)₂ (often with some sodium), occurring as small, colourless hexagonal crystals.

Origin

Early 20th century; earliest use found in Mineralogy Magazine. From French palmiérite from the name of Luigi Palmieri, Italian meteorologist + French -ite.