| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024un•du•la•tion (un′jə lā′shən, un′dyə-, -də-),USA pronunciation n. - an act of undulating;
a wavelike motion. - a wavy form or outline.
- one of a series of wavelike bends, curves, or elevations.
- [Physics.]
- Physicsa wave.
- Physicsthe motion of waves.
- undul(ate) + -ation 1640–50
Collins Concise English Dictionary © HarperCollins Publishers:: undulation /ˌʌndjʊˈleɪʃən/ n - the act or an instance of undulating
- any wave or wavelike form, line, etc
un•du•late /v. ˈʌndʒəˌleɪt, ˈʌndyə-, -də-; adj. -lɪt, -ˌleɪt/USA pronunciation v., -lat•ed, -lat•ing, adj. v. - to move with a wavelike motion: [no object]The serpent undulated across the grass.[~ + object]She undulated her hips as she performed the dance.
- to have a wavy form or surface:[no object]The hills undulated in the distance.
- (of a sound) to rise and fall in pitch:[no object]A siren undulated.
adj. - Also, ˈun•duˌlat•ed. having a wavelike form or surface;
wavy.
un•du•la•tion /ˌʌndʒəˈleɪʃən, -dyə-, -də-/USA pronunciation n. [uncountable]the sea's undulation.[countable]the undulations of the dancer's hips. WordReference Random House Unabridged Dictionary of American English © 2024un•du•late (v. un′jə lāt′, un′dyə-, -də-;adj. un′jə lit, -lāt′, un′dyə-, -də-),USA pronunciation v., -lat•ed, -lat•ing, adj. v.i. - to move with a sinuous or wavelike motion;
display a smooth rising-and-falling or side-to-side alternation of movement:The flag undulates in the breeze. - to have a wavy form or surface;
bend with successive curves in alternate directions. - (of a sound) to rise and fall in pitch:the wail of a siren undulating in the distance.
v.t. - to cause to move in waves.
- to give a wavy form to.
adj. - Also, un′du•lat′ed. having a wavelike or rippled form, surface, edge, etc.;
wavy.
- Latin undulātus waved, equivalent. to und(a) wave + -ul(a) -ule + -ātus -ate1
- 1650–60
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