adjective
(slang, dated) Clipping of radical (“excellent”).
noun
(metrology) A non-SI unit of absorbed dose of radiation, equal to 0.01 gray, that is, 1 centigray.
Symbol for the radian, a unit of measure for angle.
(automotive, plumbing, slang) Clipping of radiator.
(firearms, slang) Abbreviation of sight radius.
Clipping of radical: a political radical.