Definition of mesoline in US English:

mesoline

noun

Mineralogy
historical
  • A white granular aluminosilicate of the zeolite group, occurring on the Faroe Islands and now thought to be either levyne, chabazite, or a variety of thomsonite.

Origin

Early 19th century. From mesol- + -ine. Compare mesole.

Pronunciation

mesoline

/ˈmɛsəliːn/