Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A soft decomposed limestone, used in powder form as a polishing material.

from The Century Dictionary.

  • To polish with rottenstone.
  • noun An argillaceous or silicious limestone which by weathering has become soft and friable, the calcareous part having been wholly or in part removed.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun geology A soft, friable limestone, used in polishes

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a weathered and decomposed siliceous limestone; in powdered form it is used in polishing

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