(slang, dated) Clipping of radical; excellent

(metrology) A non-SI unit of absorbed dose of radiation, equal to 0.01 gray. / Abbreviation of radian. / (automotive, plumbing, slang) Abbreviation of radiator.

(computing, uncountable) Initialism of rapid application development. / (countable) Initialism of role activity diagram. / (medicine) Initialism of reactive attachment disorder.

(NASA, space science) Initialism of Radiation Assessment Detector (a scientific instrument of the Mars Science Laboratory onboard the Curiosity rover at Mars.)

Abbreviation of radian.

plural of rad

(slang) excellence

plural of RAD

(slang) Very good; excellent.

Alternative spelling of antirad