Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

radi-

combining form

Definition of radi-

  1. 1 :  radiant energy :  radiation <radioactive> <radiopaque>

  2. 2 :  radioactive <radioelement>

  3. 3 :  radium :  X-rays <radiotherapy>

  4. 4 :  radioactive isotopes especially as produced artificially <radiocarbon>

  5. 5 :  radio <radiotelegraphy>

  6. 6 :  radius bone <radio-ulna>



Variants of radi-

or

radio-

Origin and Etymology of radi-

French, from Latin radius ray


Medical Dictionary

radi-

combining form

Medical Definition of radi-

  1. 1:  radiant energy :  radiation <radioactive> <radiopaque>

  2. 2:  radioactive <radioelement>

  3. 3:  radium :  X-rays <radiotherapy>

  4. 4:  radioactive isotopes especially as produced artificially <radiocarbon>



Variants of radi-

or

radio-


Learn More about radi-

  1. Medical Dictionary: Definition of radi-


Seen and Heard

What made you want to look up radi-? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to criticize in a loud and angry way

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

confounded-person

Which is a synonym of indolent?

lazy melancholy frenetic philistine
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ