undulatory

adjective
un·​du·​la·​to·​ry | \ ˈən-jə-lə-ˌtȯr-ē How to pronounce undulatory (audio) , ˈən-dyə-, ˈən-də-\

Definition of undulatory

: of or relating to undulation : moving in or resembling waves : undulating

First Known Use of undulatory

1728, in the meaning defined above

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The first known use of undulatory was in 1728

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