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bone ash

a white ash obtained by calcining bones, used as a fertilizer and in the making of bone china.
Also called bone· earth·.
Origin of bone ash
First recorded in 1615-25 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for bone ash
Historical Examples
  • bone ash and phosphates are the sources of this food element.

  • Iron which has been in contact with the bone ash of burnt corpses has certain characteristics.

  • When entirely surrounded with bone ash objects are well preserved, and only covered with a thin layer of oxide.

  • Cupellation, on the other hand, collects them in the bone ash, of which the cupel is composed.

    The A B C of Mining Charles A. Bramble
  • Phosphorus is obtained from bone ash and from phosphate rock which is widely distributed over the surface of the earth.

    General Science Bertha M. Clark
  • It may be said, roughly, to consist of the constituents of true porcelain plus a proportion of bone ash.

    Chats on Old Earthenware Arthur Hayden
  • The bone ash is moistened with water, stamped in a cupel mould, and allowed to dry slowly.

    The A B C of Mining Charles A. Bramble
  • It is the chief mineral constituent of bones of animals, and bone ash is therefore nearly pure calcium phosphate.

British Dictionary definitions for bone ash

bone ash

the residue obtained when bones are burned in air, consisting mainly of calcium phosphate. It is used as a fertilizer and in the manufacture of bone china
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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