radi-
combining form
variants:
or radio-
Definition of radi-
1
: radiant energy : radiation
radioactive radiopaque
2
: radioactive
radioelement
3
: radium : X-rays
radiotherapy
4
: radioactive isotopes especially as produced artificially
radiocarbon
5
: radio
radiotelegraphy
6
: radius bone
radio-ulna
Test Your Vocabulary
Words Named After People
-
- Namesake of the leotard, Jules Léotard had what profession?

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