释义 |
isogam|ˈaɪsəʊgæm| [app. f. iso- + gamma.] 1. A line (imaginary or on a map) connecting points where the acceleration due to gravity has the same value. Freq. attrib.
1928Science 13 July 37 Isogam, surface or line of equal gravitative attraction. 1931F. H. Lahee Field Geol. (ed. 3) xxiii. 661 Isogam is the name applied to lines of equal value of relative or absolute gravity. Isogam maps.. are used to picture the variation of gravity. 1940Geogr. Jrnl. XCV. 135 The gravity pendulum..cannot produce a survey of gravity in which isogams at 2 milligal intervals can be drawn with confidence. 1954Geophysical Suppl. Monthly Notices R. Astron. Soc. VI. 180 The easiest approach to the problem..is to prepare a chart of density anomalies..and next an isogam chart of the gravity effect of these density anomalies. 2. [cf. gamma 1 c (iv).] An isodynamic line.
1940L. L. Nettleton Geophysical Prospecting for Oil viii. 163 Contours, or lines of equal magnetic intensity, are commonly called ‘isogams’. 1965G. J. Williams Econ. Geol. N.Z. xix. 354/2 A recent magnetic survey revealed a group of high values corresponding fairly well with the inferred position of the anticline; the trend of the isogams and of the high axis is almost parallel to that of the axis. |