bone ash

noun

a white ash obtained by calcining bones, used as a fertilizer and in the making of bone china.

Origin of bone ash

First recorded in 1615–25

Also called bone· earth·.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for bone ash

Bone-ash varies considerably in price, but of late samples containing 70 per cent of phosphates have sold as low as £4: 10s.
Elements of Agricultural Chemistry|Thomas Anderson
The floor of the muffle is protected with a layer of bone-ash, which absorbs any oxide of lead that may be accidentally spilt.
A Textbook of Assaying: For the Use of Those Connected with Mines.|Cornelius Beringer and John Jacob Beringer
The buttons are removed from the cupel with a pair of pliers and then brushed to remove adherent litharge and bone-ash.
A Textbook of Assaying: For the Use of Those Connected with Mines.|Cornelius Beringer and John Jacob Beringer
When heated in a closed retort, bones are not converted into bone-ash, but into a body called bone-char.
Manures and the principles of manuring|Charles Morton Aikman

The bone-ash is used moistened with a quantity of water, sufficient to make the particles adhere firmly together.
A Dictionary of Arts, Manufactures and Mines|Andrew Ure

British Dictionary definitions for bone ash

bone ash

noun

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

bone ash

noun

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Origin of bone ash

Examples from the Web for bone ash

bone ash

noun