Definition of undulator
1 : one that undulates a lovely blonde lady undulator — Wall Street Journal
2 : a device consisting of a series of magnetic dipoles of alternating polarity into which a stream of particles (such as electrons) moving at relativistic velocity is injected to produce intense essentially monochromatic coherent synchrotron radiation at a very few wavelengths
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Seen and Heard
What made you want to look up undulator? Please tell us where you read or heard it (including the quote, if possible).