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  • WordNet 3.6
    • n amphibole a mineral or mineral variety belonging to the amphibole group
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Webster's Revised Unabridged Dictionary
    • n Amphibole ăm"fĭ*bōl (Min) A common mineral embracing many varieties varying in color and in composition. It occurs in monoclinic crystals; also massive, generally with fibrous or columnar structure. The color varies from white to gray, green, brown, and black. It is a silicate of magnesium and calcium, with usually aluminium and iron. Some common varieties are tremolite actinolite asbestus edenite hornblendethe last name being also used as a general term for the whole species). Amphibole is a constituent of many crystalline rocks, as syenite, diorite, most varieties of trachyte, etc. See Hornblende.
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Century Dictionary and Cyclopedia
    • n amphibole A name given by Haüy to hornblende, from its resemblance to augite, for which it may readily be mistaken: now used as a general term to include all the varieties of which common hornblende is one. See hornblende.
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Chambers's Twentieth Century Dictionary
    • n Amphibole am-fib′ol-ē the name of a group of minerals which are essentially silicates of lime and magnesia, but these bases are often partly replaced by alumina, and oxides of iron and manganese—tremolite, nephrite (jade), and hornblende.
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Webster's Revised Unabridged Dictionary
Gr. 'amfi`bolos doubtful, equivocal, fr. 'amfiba`llein to throw round, to doubt: cf. F. amphibole,. Haüy so named the genus from the great variety of color and composition assumed by the mineral
Chambers's Twentieth Century Dictionary


In literature:

Amphibole, potash in, 220.
"Manures and the principles of manuring" by Charles Morton Aikman
An amphibole-asbestos is obtained from Sall Mountain, Georgia; and asbestos has also been worked in the serpentine of Vermont.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7" by Various