| 释义 |
isochronal, a.|aɪˈsɒkrənəl|
Also 8 erron. -cronal.
[f. mod.L. isochron-us (Leibnitz), a. Gr. ἰσόχρον-ος equal in time (f. ἰσο-, iso- + χρόνος time) + -al1. Cf. F. isochrone (1703 in Hatz.–Darm.).]
1. = isochronous a. 1.
† isochronal line [tr. L. linea isochrona (Leibnitz, 1689)], a curve in which a heavy body descends with uniform velocity, i.e. moving through equal spaces in equal times. Obs.
1680H. More Apocal. Apoc. 264 The Entireness of his Kingdom is Synchronal to the two Witnesses Prophesying in Sackcloth, they being both Isochronal, or of equal time. 1706W. Jones Syn. Palmar. Matheseos 290 In a Medium that does not resist, the shorter Oscillations in a Cycloid are nearly Isocronal. 1794Atwood in Phil. Trans. LXXXIV. 136 The isochronal property of spiral springs. 1838Penny Cycl. XII. 298/2 The isochronal property which Galilei ascribed to the pendulum. 1866Brande & Cox Dict. Sci., etc., Isochronal axes, in Mechanics, axes around which if a body be made to oscillate, the oscillations will be performed in equal times.
2. Of a line: connecting points at which a particular event occurs or occurred at the same time. Of a diagram: depicting such lines. Also as n., = isochron 2.
1926[see isepiptesis, isopiptesis]. 1937D. Kennedy tr. Imamura's Theoret. & Appl. Seismol. iv. 42 If a line is passed through places where a certain phase of the earthquake motion..appears simultaneously..a line resembling an isoseismal is obtained. It is the coseismal, or the isochronal of some recent writers. 1948R. B. Hounsfield Traffic Surveys vi. 39 Another type of diagram used in planning is the ‘isochronal’ diagram. Ibid. 40 (caption) Isochronal diagram showing accessibility of different areas. 1962C. D. Sherman tr. Dorst's Migrations of Birds vii. 236 The influence of temperature, revealed in this parallelism between isochronal lines and isotherms, may be less apparent because of other factors which also govern migration.
Hence iˈsochronally adv. = iˈsochronously.
1882Ogilvie, Isochronally, so as to be isochronal. |