Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A greenish variety of amphibole.

from The Century Dictionary.

  • noun A trade-name of an apparatus by which the ultra-violet rays may be employed in the treatment of cutaneous diseases.
  • noun A radiatedmineral, called by Werner strahlstein (ray-stone), consisting of silicates of calcium, magnesium, and iron.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Min.) A bright green variety of amphibole occurring usually in fibrous or columnar masses.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun mineralogy A mineral with monoclinic crystals of the chemical formula Ca2(Mg,Fe)5Si8O22(OH)2, belonging to the amphibole group.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a green mineral of the amphibole group; calcium magnesium iron silicate

Etymologies

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