- the granular crystalline form of potassium carbonate
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
Examples from the Web for pearl ash
The proportion is an ounce of pearl-ash to half a pint of water.
The pearl-ash must be previously melted in a little lukewarm water.
On no account use a particle of soda, pearl-ash, or any thing of the kind.Mrs. Hale's Receipts for the Million
Sarah Josepha Hale
Lastly, a small tea-spoonful of pearl-ash or sal-aratus dissolved in a little warm water.
Beat four eggs very light; and add them to the mixture with a salt-spoonful of pearl-ash melted in a little lukewarm water.