Meaning of RAD in English

RAD

I. ˈrad noun

Etymology: r adiation a bsorbed d ose

Date: circa 1953

: a unit of absorbed dose of ionizing radiation equal to an energy of 100 ergs per gram of irradiated material

II. adjective

Date: 1982

slang : cool 7, radical

III. abbreviation

1. radian

2. radius

3. radix

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.