cymoscope

Etymology
First attested as in 1903 and as  in 1905; formed as  (the short stem of the, from the , kūma, “wave”) +. is philologically prescribed in place of because it preserves the long stem (, kūmat-) of its ultimate  etymon, which properly does not form compounds on its short stem (, kūm-).

Noun

 * 1)  A  of  waves.