Definition of hellandite in English:

hellandite

noun

Mineralogy
  • Any of a group of minerals found as brownish-red prismatic crystals in pegmatite veins in Norway and other localities including parts of Canada and California.

Origin

Early 20th century; earliest use found in Journal of the Chemical Society. From German Hellandit from the name of A. T. Helland, Norwegian geologist + German -it.

Pronunciation

hellandite

/ˈhɛlɪndʌɪt/