Meaning of RAD in English

RAD

I. noun Etymology: radiation absorbed dose Date: circa 1953 a unit of absorbed dose of ionizing ~iation equal to an energy of 100 ergs per gram of ir~iated material, II. adjective Date: 1982 cool 7, ~ical , III. abbreviation ~ian, ~ius, ~ix

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.