undulation

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noun un·du·la·tion \ˌən-jə-ˈlā-shən, ˌən-dyə-, ˌən-də-\

Definition of undulation

  1. 1a :  a rising and falling in wavesb :  a wavelike motion to and fro in a fluid or elastic medium propagated continuously among its particles but with little or no permanent translation of the particles in the direction of the propagation :  vibration

  2. 2 :  the pulsation caused by the vibrating together of two tones not quite in unison

  3. 3 :  a wavy appearance, outline, or form :  waviness

1646

First Known Use of undulation

1646



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