Caustic

{kazvs’-tik) [naieLV, to burn]. I. Very irritant; burning; capable of destroying ti ue. 2. A substance that destroys ti ue. C. Alkali, a pure alkaline hydrate or oxid. C, Lunar, argentic nitrate. C, Mitigated, argentic nitrate made le active by fusion with pota ium nitrate or argentic chlorid. C. Potash, pota ium hydrate. C. Soda, sodium hydrate. 180