boneblack

or bone black

[ bohn-blak ]

noun

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

boneblack

/ ˈbəʊnˌblæk /

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

Word History and Origins

Origin of boneblack¹

First recorded in 1805–15; bone ( def ) + black

Example Sentences

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

From Project Gutenberg