Medical Definition of hippus
: a spasmodic variation in the size of the pupil of the eye caused by a tremor of the iris
Test Your Vocabulary
Which Word Does Not Belong?
-
- Which of these words does not mean "nonsense"?

Test your vocabulary with our 10-question quiz!
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share hippus