Definition of mirabilite in US English:

mirabilite

noun

Mineralogy
  • Native hydrated sodium sulphate, Na₂SO₄·10H₂O, a monoclinic mineral usually occurring as colourless prisms or massive deposits, especially near salt springs or lakes, and in caves. Also called Glauber's salt.

Origin

Mid 19th century; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher. From German Mirabilit from classical Latin mīrābilis + German -it.

Pronunciation

mirabilite

/mɪˈrabəlʌɪt/