Gain access to thousands of additional definitions and advanced search features—ad free! JOIN NOW
circa 1828, in the meaning defined above
Keep scrolling for more
Share undulatory theory
Resources for undulatory theory
Time Traveler for undulatory theory
See more words from the same year
More Definitions for undulatory theory
Comments on undulatory theory
What made you want to look up undulatory theory? Please tell us where you read or heard it (including the quote, if possible).
a servile follower or underling
Get Word of the Day daily email!
What did you just call me?! A Quiz
Test your visual vocabulary with our 10-question challenge!
Test Your Knowledge - and learn some interesting things along the way.
Roger Stone posts controversial photo
Former RNC chair derides Trump
emergency, national emergency
Trump declares crisis over wall
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
Conjugating an irregular verb
It relates to godfathers.
Nothing to see here.
Words from the week of 2/15/2019
Comedian ISMO on what separates a boot from a trunk
Comedian ISMO on the complexities of the word 'tip'
How to use a word that (literally) drives some people nuts.
The awkward case of 'his or her'
Never be caught off guard
A quiz for lovers and haters
A game of winding words.