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bone·blackalso 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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.