Definition of alumocalcite in English:

alumocalcite

noun

Mineralogy
rare
  • A variety of opal containing lime and alumina as impurities.

Origin

Mid 19th century; earliest use found in Charles Shepard (1804–1886). From German Alumocalcit (A. BREITHAUPT Vollständige Charakteristik des Mineral-Syst. (ed. 3, 1832) 97; from alum- (in † Alumina) + -o- + classical Latin calc-, calx lime + German -it), with remodelling of the ending after words in -ite.

Pronunciation

alumocalcite

/əˌl(j)uːmə(ʊ)ˈkalsʌɪt/