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undulation [undulations]▼(wavelike motion)noun[UK: ˌʌn.djʊ.ˈleɪʃ.n̩] [US: ˌʌn.djʊ.ˈleɪʃ.n̩]
undulate [undulated, undulating, undulates]▼(transitive: cause to move in a wave)verb[UK: ˈʌn.djʊ.leɪt] [US: ˈʌn.dʒə.ˌlet]
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