Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A black pigment containing about 10 percent charcoal, made by roasting bones in an airtight container and used in polishes, as a filtering medium, and in decolorizing sugar. Also called bone charcoal.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A preparation containing carbonized bone, used as a pigment and a filtering medium.

from the GNU version of the Collaborative International Dictionary of English

  • n. See Bone black, under bone, n.

Etymologies

bone +‎ black (Wiktionary)

Examples

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