'KOH' definitions:
Definition of 'KOH'
From: GCIDE
- Potash \Pot"ash`\, n. [Pot + ash.] (Chem.) (a) The hydroxide of potassium hydrate, a hard white brittle substance, KOH, having strong caustic and alkaline properties; -- hence called also caustic potash. (b) The impure potassium carbonate obtained by leaching wood ashes, either as a strong solution (lye), or as a white crystalline (pearlash). [1913 Webster]
Definition of 'KOH'
From: GCIDE
- Caustic \Caus"tic\, Caustical \Caus"tic*al\, a. [L. caustucs, Ge. ?, fr. ? to burn. Cf. Calm, Ink.]
- 1. Capable of destroying the texture of anything or eating away its substance by chemical action; burning; corrosive; searing. [1913 Webster]
- 2. Severe; satirical; sharp; as, a caustic remark. [1913 Webster]
- Caustic curve (Optics), a curve to which the ray of light, reflected or refracted by another curve, are tangents, the reflecting or refracting curve and the luminous point being in one plane.
- Caustic lime. See under Lime.
- Caustic potash, Caustic soda (Chem.), the solid hydroxides potash, KOH, and soda, NaOH, or solutions of the same.
- Caustic silver, nitrate of silver, lunar caustic.
- Caustic surface (Optics), a surface to which rays reflected or refracted by another surface are tangents. Caustic curves and surfaces are called catacaustic when formed by reflection, and diacaustic when formed by refraction.
- Syn: Stinging; cutting; pungent; searching. [1913 Webster]