Definition of michaelsonite in English:

michaelsonite

noun

Mineralogy
rare
  • A silicate of zirconium, iron, calcium, beryllium, and certain rare earth metals.

Origin

Mid 19th century; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher. From the name of Carl August Michaelson, Swedish chemist, who first analysed it in 1862 + -ite.