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amphibole Syllabification: am·phi·bole
Pronunciation: /ˈamfəˌbōl/

Definition of amphibole in English:


Any of a class of rock-forming silicate or aluminosilicate minerals typically occurring as fibrous or columnar crystals.
Example sentences
  • During obduction, mantle-derived magmas most likely evolved to granitic compositions by assimilation of sediments and by fractional crystallization of amphibole, feldspar, titanite and allanite.
  • Associated with the fayalite are quartz, amphibole, and magnetite.
  • They contain sulfide minerals as well as metamorphic minerals that include cordierite, gahnite, epidote, garnet, amphiboles, schorl, and many others.


Early 19th century: from French, from Latin amphibolus 'ambiguous' (so called because of the varied structure of these minerals), from Greek amphibolos, from amphi- 'both, on both sides' + ballein 'to throw'.

Definition of amphibole in:
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