(n) (chemistry) the theory that all indicators are either weak acids or weak bases in which the color of the ionized form is different from the color before dissociation, Syn. Ostwald's theory of indicators
[ちょうせきそとば, chousekisotoba] (n) (See 町石) stupa-shaped stone distance indicators placed at intervals of one cho (approx. 109 meters) on a temple approach