I. ˈrad adjective
Etymology: Middle English, from Old English hræd — more at rathe
dialect : quick , ready , eager ; also : elated , exhilarated
II. adjective
Etymology: Middle English, of Scandinavian origin; akin to Old Norse hræddr afraid, hrathr quick, rash — more at rathe
Scotland : afraid
III. noun
( -s )
Etymology: short for radiation
: a unit of absorbed dose of ionizing radiation equal to an energy of 100 ergs per gram of irradiated material
IV. abbreviation
1. radial
2. radian
3. radiant
4. radiator
5. radical
6. radio
7. radium
8. radius
9.
[Latin radix ]
root
V. ˈrad adjective
Etymology: short for radical (herein)
slang : cool 8