potassium hydroxide

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po·tas·si·um hy·drox·ide (KOH),

KOH; a strong, penetrating caustic.
Synonym(s): caustic potash

po·tas·si·um hy·drox·ide

(KOH) (pŏ-tasē-ŭm hī-droksīd)
Strong, penetrating caustic.