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also bone black  (bōn′blăk′)
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.


(Dyeing) 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

bone′ black`

a black carbonaceous substance obtained by calcining bones in closed vessels, used esp. as a pigment.
References in periodicals archive ?
And the Amazon queen With boneblack face Wears a mask with an apeskin beard; she grinds her male child's bones in a mortar, binds Him for food, and the people buy.