a white ash obtained by calcining bones, used as a fertilizer and in the making of bone china.
- Also called bone earth.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use bone ash in a sentence
Coprolites are seldom used alone for the manufacture of superphosphates, but are generally mixed with bone-ash and bone dust.Elements of Agricultural Chemistry | Thomas Anderson
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
This is put in its place, and the cylinder filled (or nearly so) with the moistened bone ash.
The floor of the muffle is protected with a layer of bone-ash, which absorbs any oxide of lead that may be accidentally spilt.
The buttons are removed from the cupel with a pair of pliers and then brushed to remove adherent litharge and bone-ash.
British Dictionary definitions for 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