rad

IPA: rˈæd

(metrology) A non-SI unit of absorbed dose of radiation, equal to 0.01 gray.
A political radical.
Abbreviation of radian. [(geometry) In the International System of Units, the derived unit of plane angular measure of angle equal to the angle subtended at the centre of a circle by an arc of its circumference equal in length to the radius of the circle. Symbol: rad.]
(automotive, plumbing, slang) Abbreviation of radiator. [Anything which radiates or emits rays.]
(firearms, slang) Abbreviation of sight radius. [(firearms) The distance between the front and rear sights of a firearm.]
(computing, uncountable) Initialism of rapid application development.
(countable) Initialism of role activity diagram. [(business) A diagram illustrating the roles of people, teams, etc. in an organization and how they interact with each other and in response to external events.]
(medicine) Initialism of reactive attachment disorder. [(medicine, psychology, pediatrics) A rare but serious condition in which an infant or young child fails to establish healthy attachments with parents or caregivers.]
(NASA, space science) Initialism of Radiation Assessment Detector (a scientific instrument of the Mars Science Laboratory onboard the Curiosity rover at Mars.)

(slang, dated) Clipping of radical; excellent [Favoring fundamental change, or change at the root cause of a matter.]

Examples of "rad" in Sentences

i think it's rad that used the word rad in this post.
While the word rad is completely outdated it totally applies to this cake.
September 24, 2005 17: 53 b-rad: is there a mfr radio station? and more importantly, is it online?
The rad is a unit of absorbed radiation dose in terms of the energy actually deposited in the tissue.
However, I wouldn't call it rad, simply because I wouldn't call anything rad -- never have and never will use that word.
By the way, is _radix_ perhaps derived from [Sanskrit: rad] (_rad_), a tooth (from the fang-like form of roots), whence _rodere_ and possibly _radius_?
But there is nothing I'd rather do than lay in my bed listening to rad music with a rad boy and talk about rad things ... and say rad alot.rad. where did the word rad come from, i know its derived from Radical, but please ... somebody fill me in.