The Collaborative International Dictionary
Potassoxyl
Potassoxyl \Pot`ass*ox"yl\, n. [Potassium + oxygen + -yl.] (Chem.) The radical KO, derived from, and supposed to exist in, potassium hydroxide and other compounds.
Wiktionary
potassoxyl
n. (context chemistry archaic English) The radical KO, derived from, and supposed to exist in, potassium hydroxide and other compounds.