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waveform [waveforms]▼(mathematics)noun[UK: wˈeɪvfɔːm] [US: wˈeɪvfɔːrm]
undulation [undulations]▼(appearance or outline)noun[UK: ˌʌn.djʊ.ˈleɪʃ.n̩] [US: ˌʌn.djʊ.ˈleɪʃ.n̩]
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