Actinolite

ahd-5
  • noun. A greenish variety of amphibole.
  • The Century Dictionary and Cyclopedia
  • 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.
  • the GNU version of the Collaborative International Dictionary of English
  • noun. A bright green variety of amphibole occurring usually in fibrous or columnar masses.
  • Wiktionary, Creative Commons Attribution/Share-Alike License
  • noun. A mineral with monoclinic crystals of the chemical formula Ca2(Mg,Fe)5Si8O22(OH)2, belonging to the amphibole group.
  • WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
  • noun. a green mineral of the amphibole group; calcium magnesium iron silicate
  • Word Usage
    "In accompanying notes, a geologist identified as W.J. Hunter boasted of a rock formation from the Miocene Epoch that gleamed with boulders of "tourmaline-actinolite-quartz plutonites.""