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boneblack

[bohn-blak]

noun

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

Also, bone black.

Origin:
1805–15; bone¹ + black

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Boneblack is always a great word to know.

So is ninnyhammer. Does it mean:

a stew of meat, vegetables, potatoes, etc.

a fool or simpleton; ninny.

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Collins

World English Dictionary

boneblack (ˈbəʊnˌblæk)

—n
	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 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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boneblack

bone·black