Definition of manganaxinite in US English:

manganaxinite

noun

Mineralogy
  • A mineral of the axinite group, Ca₂Mn2+Al₂BSi₄O₁₅OH, which crystallizes in the triclinic system, and occurs in pegmatite formations. More generally: an axinite with a composition near to this, specifically one with a high proportion of calcium, and with a greater proportion of manganese than iron.

Origin

Early 20th century; earliest use found in Mineralogy Magazine. From German Manganaxinit from Mangan + Axinit.

Pronunciation

manganaxinite

/maŋɡəˈnaksɪnʌɪt/