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boneblack

or bone black

[bohn-blak]
noun
  1. a black, carbonaceous substance obtained by calcining bones in closed vessels, used as a black pigment, a decolorizing agent, etc.
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Origin of boneblack

First recorded in 1805–15; bone + black
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for boneblack

Historical Examples of boneblack

  • While they may improve conditions somewhat, the only solution to such a problem is the use of the boneblack process.

    The Philippine Agricultural Review

    Various

British Dictionary definitions for boneblack

boneblack

noun
  1. a black residue from the destructive distillation of bones, containing about 10 per cent carbon and 80 per cent calcium phosphate, used as a decolorizing agent and pigment
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012