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Meaning of boracite

bo•ra•cite

Pronunciation: (bôr'u-sīt", bōr'-), [key]
— n.
  1. a strongly pyroelectric mineral, a borate and chloride of magnesium, MgClBO, occurring in white or colorless cubic crystals or fine-grained masses.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.