Definition of magnesiohornblende in English:

magnesiohornblende

noun

Mineralogy
  • A hornblende belonging to the series Ca ₂ (Mg,Fe+2) ₄ Al(Si ₇ Al)O ₂₂ (OH,F) ₂ in which the proportion of magnesium is equal to or greater than that of iron, occurring naturally as green or greenish-black prismatic crystals and in massive form.

Origin

1970s; earliest use found in Mineralogy Magazine. From magnesium + -o- + hornblende.

Pronunciation

magnesiohornblende

/maɡˌniːzɪəʊˈhɔːnblɛnd/