First Known Use: circa 1953
Dictionary
1rad
noun \ˈrad\
Definition of RAD
: a unit of absorbed dose of ionizing radiation equal to an energy of 100 ergs per gram of irradiated material
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Origin of RAD
radiation absorbed dose
2rad
adjective
: very appealing or good
Full Definition of RAD
slangSee rad defined for English-language learners
First Known Use of RAD
1982
3rad
abbreviation
Definition of RAD
1
radian
2
radius
3
radix
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