the granular crystalline form of potassium carbonate
pearlash in American English
(ˈpɜːrlˌæʃ)
noun
commercial potassium carbonate
Word origin
[1720–30; pearl1 + ash1]This word is first recorded in the period 1720–30. Other words that entered Englishat around the same time include: berm, catchword, cordon bleu, deadwood, fantail