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gypsum: Meaning and Definition of

gyp•sum

Pronunciation: ( jip'sum), [key]
— n.
  1. a very common mineral, hydrated calcium sulfate, CaSO&multiplydot;2HO, occurring in crystals and in masses, soft enough to be scratched by the fingernail: used to make plaster of Paris, as an ornamental material, as a fertilizer, etc.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
gypster gypsum board
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