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boneblack

or bone black

[ bohn-blak ]
/ ˈboʊnˌblæk /
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noun
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. 2023

How to use boneblack in a sentence

British Dictionary definitions for boneblack

boneblack
/ (ˈbəʊnˌblæk) /

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
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