名詞 rad.:

1. a unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material
   同義詞：rad
2. the unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees)
   同義詞：radian, rad

rad.
abbr.（略語）
Mathematics Radical.
【數(shù)學】 Radical.
Radio.
Radio.
Mathematics Radius.
【數(shù)學】 Radius.
Mathematics Radix.
【數(shù)學】 Radix.