n. a trivial name for chemical compound potassium hydroxide.
the GNU version of the Collaborative International Dictionary of English
n. Potassium oxide.
n. Potassium hydroxide, commonly called caustic potash.
The Century Dictionary and Cyclopedia
n. Potash.
Word Usage
"Here is a salt called chlorate of potassa, which is now made in large quantities for bleaching, and chemical and medical uses, and for pyrotechnic and other purposes."