| 单词 |
galvanotropism |
| 释义 |
galvanotropism|ˌgælvənəʊˈtrɒpɪz(ə)m|
[f. galvano- + Gr. τρόπ-ος turning + -ism.]
The phenomenon of curvature produced in growing plant-organs by the passage of electric currents through them; movement produced in plants or animals by the stimulus of an electric current. Hence ˌgalvanoˈtropic a.
1885Vines in Encycl. Brit. XIX. 60 These phenomena are spoken of as ‘galvanotropism’. 1895Science Progress IV. 100 The essential fact upon which the galvanotropic effect turns is that current down the animal has a quieting action, current up the animal an exciting action. Ibid. 101 Fertilised frog's eggs..exhibit remarkable galvanotropic effects. Ibid., There is in many cases a remarkable orientation in relation to the current—‘galvanotropism’. 1918J. Loeb Forced Movements iv. 41 Galvanotropic reactions are found throughout the whole animal kingdom. Ibid. 42 Phenomena of galvanotropism can be observed also in infusorians. 1936Discovery June 198/1 The planarian Leptoplana variabilis is negatively phototropic and kathodically galvanotropic. 1959T. H. Savory Instinctive Living iii. 28 Some of them are synonyms—e.g. electrotropism and galvanotropism. |
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