| 释义 |
ˈundular, a.
[ad. L. type *undulār-is: cf. next.]
a. Wavy, undulating.
1738Chambers Cycl. s.v. Muscle, They contract themselves into an undular kind of surface.
b. Applied to a type of hydraulic jump consisting of a number of waves of diminishing size trailing downstream, with little difference in the water levels on either side of them.
1961V. L. Streeter Handbk. Fluid Dynamics xxiv. 36 On the basis of Froude number..the hydraulic jump may be classified into five types... For F1 = 1 to 1·7, the flow surface shows undulations; an undular jump is formed. 1982Sci. Amer. June 134/2 Whether a particular bore is breaking or undular depends on the height of the tide, the depth of the river, [etc.].
Hence ˈundularly adv.
1805T. Weaver tr. Werner's Ext. Charact. Fossils 275, 1. Spherically..2. Undularly. |