forming words, with the meanings:
denoting radio
radiotelegraphy
denoting radiation or radioactivity
radiotherapy
denoting radioactive isotopes of (a specified element)
radiocarbon
radiant energy or radiation
radiobiology
radioactive
radioelement
using ionizing radiation
radiotherapy
radioactive isotopes of (a specified element)
radiocarbon
radius
radio-ulna
[French radio- from Latin radius ray1]