Amphibole Am"phi*bole ([a^]m"f[i^]*b[=o]l), n. [Gr. 'amfi`bolos doubtful, equivocal, fr. 'amfiba`llein to throw round, to doubt: cf. F. amphibole. Ha["u]y so named the genus from the great variety of color and composition assumed by the mineral.] (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}, {hornblende} (the 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}. [1913 Webster]

The Collaborative International Dictionary of English. 2000.


Look at other dictionaries:

  • Actinolite — Ac*tin o*lite, n. [Gr. ?, ?, ray + lite.] (Min.) A bright green variety of amphibole occurring usually in fibrous or columnar masses. [1913 Webster] …   The Collaborative International Dictionary of English

  • actinolite — [ak tin′ə līt΄] n. a dark colored, often greenish amphibole, Ca2 (Mg, Fe) 5 (Si8O22)(OH) 2, commonly found in schists and marbles …   English World dictionary

  • Actinolite — For the community in Canada, see Actinolite, Ontario. Actinolite Actinolite crystal from Portugal General Category …   Wikipedia

  • actinolite — actinolitic /ak tin l it ik, ak teuh nl /, adj. /ak tin l uyt , ak teuh nl /, n. Mineral. a variety of amphibole, occurring in greenish bladed crystals or in masses. [1825 35; ACTINO + LITE] * * * Colourless to green amphibole mineral, darkening… …   Universalium

  • actinolite — aktinolitas statusas T sritis chemija apibrėžtis Mineralas. formulė Ca₂(Mg,Fe)₅[(OH,F)|Si₄O₁₁]₂ atitikmenys: angl. actinolite rus. актинолит …   Chemijos terminų aiškinamasis žodynas

  • actinolite — noun Date: 1796 a bright green or grayish green mineral of the amphibole group that is a silicate of calcium, magnesium, and iron occurring in fibrous, radiate, or columnar forms …   New Collegiate Dictionary

  • Actinolite — Actinote (minéral) Pour les articles homonymes, voir Actinote. Actinote Catégorie IX : silicates …   Wikipédia en Français

  • actinolite — noun A mineral with monoclinic crystals of the chemical formula Ca(Mg,Fe)SiO(OH), belonging to the amphibole group …   Wiktionary

  • actinolite — ac·ti·no·lì·te s.f. TS mineral. minerale del gruppo degli anfiboli monoclini, che si presenta in aggregati di cristalli fibrosi di colore variabile dal grigioverde al verde scuro {{line}} {{/line}} DATA: 1892. ETIMO: comp. di actino e 1 lite …   Dizionario italiano

  • actinolite — [ak tɪnəlʌɪt] noun a green mineral of the amphibole group occurring chiefly in metamorphic rocks and as a form of asbestos. Origin C18: from Gk aktis, aktin ray + lithos stone (because of the ray like crystals) …   English new terms dictionary

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