English Dictionary: KOH | by the DICT Development Group |
2 results for KOH | |
From Webster's Revised Unabridged Dictionary (1913) [web1913]: | |
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). | |
From Webster's Revised Unabridged Dictionary (1913) [web1913]: | |
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. 2. Severe; satirical; sharp; as, a caustic remark. {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. |