Definition of bytownite in English:

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Pronunciation: /ˈbʌɪtaʊnʌɪt/


[mass noun]
A mineral present in many basic igneous rocks, consisting of a calcic plagioclase feldspar.
Example sentences
  • They range from bytownite - labradorite in basalts and gabbros, andesine - oligoclase in diorites and andesites to albite in granites and rhyolites.
  • The groundmass consists mainly of bytownite with large grains of diopside and of colourless olivine, and small octahedrons of magnetite.
  • The highly soluble and aluminous bytownite favored the formation of allophane.


Mid 19th century: from Bytown, the former name of Ottawa, Canada, + -ite1.

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Line breaks: by¦town|ite

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