Definition of microsommite in English:

microsommite

noun

Mineralogy
  • A trigonal aluminosilicate of sodium, calcium, and potassium which occurs as colourless crystals in volcanic rocks.

Origin

Late 19th century. From Italian microsommite from micro- + Somma, name of one of the volcanic peaks of Vesuvius + -ite.

Pronunciation

microsommite

/mʌɪkrə(ʊ)ˈsɒmʌɪt/