CAUSTIC; CAUSTICAL a.
ustic 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 form…
CHAIN n.
on, by which, when several ratios of equality are given, the consequent of each being the same as the antecedent of the next, the relation between the first antecedent and the last consequent is discovered. -- Chain shot (Mil.), two cannon balls united by a shot chain, formerly used in naval warfare on account of thei…