| 释义 |
bifilar, a.|baɪˈfaɪlə(r)|
[f. bi- prefix2 1 + filar, f. L. fīl-um thread + -ar.]
Fitted or furnished with two threads; spec. applied to apparatus for measuring minute distances or angles; also for suspending a body so that it has a very slight directive force in a definite plane, with a view to the measurement of minute forces, etc. Also as n. biˈfilarly adv., in a bifilar manner, by means of two threads.
[1836W. S. Harris in Trans. R. Soc. CXXVI. 417 A new species of balance; it may be termed, from the peculiar mechanical principle on which it depends, a bifile balance.] 1839Whewell Let. to Quételet 17 Jan. (1876) II. 275 Airy has just put up his Gaussian apparatus..at Greenwich, including a Bifilar. 1846Penny Cycl. Suppl. II. 256/1 The horizontal force magnetometer at the Greenwich Observatory is bifilar. 1848W. S. Harris Rudimentary Electricity iii. 83 The Bifilar Balance. In this electrometer..a re-active force is obtained by means of a lever at the extremity of two parallel and vertical threads of unspun silk. 1870R. Ferguson Electr. 26 Gauss's bifilar magnetometer. 1879Thomson & Tait Nat. Phil. I. i. §435 The Bifilar Suspension..was used also by Gauss in his bifilar magnetometer for measuring the horizontal component of the terrestrial magnetic force. 1884Harper's Mag. Sept. 644/1 A copper disc suspended bifilarly. |