boneblack

or bone black

[bohn-blak]

noun

a black, carbonaceous substance obtained by calcining bones in closed vessels, used as a black pigment, a decolorizing agent, etc.

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

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

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