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undulatory

[uhn-juh-luh-tawr-ee, -tohr-ee, uhn-dyuh-, -duh-]
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adjective
  1. Also un·du·lar. moving in undulations.
  2. having the form or appearance of waves.
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Also un·du·la·tive [uhn-juh-ley-tiv, uhn-dyuh-, -duh-] /ˈʌn dʒəˌleɪ tɪv, ˈʌn dyə-, -də-/.

Origin of undulatory

First recorded in 1720–30; undulate + -ory1
Related formsnon·un·du·la·to·ry, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for undular

undulatory

adjective
  1. caused by or characterized by waves or undulations
  2. having a wavelike motion or form
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012