Rad Definition
 răd 
  rads
  
    noun
  
 
    rads
  
A basic unit of an absorbed dose of radiation, equal to the absorption of 100 ergs of energy per gram of material or 0.01 joule per kilogram of material (0.01 gray or 1.1 roentgen)
 Webster's New World 
Abbreviation of radian.
Wiktionary 
(automotive, plumbing, slang) Abbreviation of radiator.
Wiktionary 
Synonyms: 
  
    abbreviation
  
 Radian(s)
 Webster's New World 
Radical.
 Webster's New World 
Radius.
 Webster's New World 
Radix.
 Webster's New World 
Other Word Forms of Rad
Noun
Singular:
 radPlural:
 radsOrigin of Rad
- r(adiation) a(bsorbed) d(ose) - From American Heritage Dictionary of the English Language, 5th Edition 
- Short for radical - From American Heritage Dictionary of the English Language, 5th Edition 
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