Effect That Changes a Wave’s Observed Frequency

This page is the CodyCross answer for the clue below from Culinary Arts, Group 126, Puzzle 5 (Potato Peeler).

Question is: Effect That Changes a Wave’s Observed Frequency

and the answer is: DOPPLER

Word Meaning:

DOPPLER — (medicine, by ellipsis, informal) Ellipsis of Doppler ultrasonography: Any of various types of ultrasonography that use the Doppler effect; especially, medical versions thereof.

Definitions from Wiktionary.

Effect that changes a wave’s observed frequency — CodyCross Answer | CodyCross Solutions