Definition of rad
(Entry 1 of 3)
: a unit of absorbed dose of ionizing radiation equal to an energy of 100 ergs per gram of irradiated material
rad
adjectiveDefinition of rad (Entry 2 of 3)
slang
rad
abbreviationDefinition of rad (Entry 3 of 3)
1
radian
2
radius
3
radix
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Merriam-Webster unabridged
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Time Traveler for rad
The first known use of rad was circa 1953
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