| 单词 |
electroscope |
| 释义 |
electroscope|ɪˈlɛktrəʊskəʊp|
[f. electro- + Gr. -σκόπος looker.]
An instrument for ascertaining the presence of electricity, and its quality if present. Hence eˌlectroˈscopic a. [see -ic], measured by the electroscope.
1810J. A. De Luc in Jrnl. Nat. Philos., etc. XXVII. 83 The pile produces the same effects with so small a quantity of the [electric] fluid, as to be often hardly sufficient to move the gold leaf electroscope. 1824Mech. Mag. No. 66. 150 The aerial electroscope is an instrument for determining the electric state of the atmosphere. 1842Turner Chem. (ed. 7) 85 Several simple electroscopic methods. 1844H. M. Noad Lect. Electr. (ed. 2) 448/1 Condensing Electroscope. 1870R. Ferguson Electr. 53 A gold leaf electroscope. 1879Encycl. Brit. VIII. 34/1 Advantage of this principle has been taken in the condensing electroscope of Volta, which is an ordinary gold-leaf apparatus, except that the knob is replaced by a circular disc. 1879G. B. Prescott Sp. Telephone 285 The electroscopic delicacy of the telephone. 1881Maxwell Electr. & Magn. I. 300 Instruments by means of which the existence of electric charges..may be indicated, but which are not capable of affording numerical measures, are called Electroscopes. 1908Practitioner Sept. 364 By means of the electroscope the passage of the tube can be controlled, if it should meet with any obstruction from pathological displacements of the oesophagus. 1955Gloss. Terms Radiology (B.S.I.) 21 Electroscope, an instrument for indicating a potential difference by electrostatic means. |
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