Definition of meionite in US English:

meionite

(also mionite)

noun

Mineralogy
  • A tetragonal aluminosilicate mineral that is the calcium- and carbonate-rich endmember of the scapolite series and occurs as transparent, translucent, or pearly crystals of various colours.

Origin

Early 19th century; earliest use found in Journal of Natural Philosophy, Chemistry and the Arts. From French meïonite from ancient Greek μείων lesser, less + French -ite.

Pronunciation

meionite

/ˈmʌɪənʌɪt/