This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. That undulates, or that causes undulations

adj. Moving in the manner of undulations, or waves; resembling the motion of waves, which successively rise or swell rise or swell and fall; pertaining to a propagated alternating motion, similar to that of waves.

Having the character of an undulation; moving in or marked by undulations; undulating: as, an undulatory current of electricity; the undulatory motion of water, of air, or other fluid.

Having the form or appearance of a series of waves.

Of or pertaining to undulation; assuming undulating movements of some medium as the physical explanation of some class or group of phenomena: as, the undulatory theory of light.

adj. resembling waves in form or outline or motion

"An _undulatory_ shock consists of one or several waves, the movement to and fro being along a nearly horizontal line; a _subsultory_ shock of movements in a nearly vertical direction; while a _vorticose_ shock consists of undulatory or subsultory movements crossing one another in different directions."

wave theory   

undulatory current    undulatory theory of light   

wavy    rolling    rippling    ripply    crinkly   

spin-network    electroweak    epicyclic    55-year-old    rille