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camptonite

[kamp-tuh-nahyt]
noun
  1. a lamprophyric rock occurring in dikes and composed of labradorite, pyroxene, sodic hornblende and olivine.
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Origin of camptonite

< German (1887), named after Campton, New Hampshire; see -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018