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rad SimpleWikiWiktionaryGoogle検索CollinsCambridgeLongmanLongman英和Learners 【 46736 】 【意味】 "[名詞] 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) [例] The radius of the circle is equal to the angle in radians. [例] The angle is 1.5 rad. [例] He knew that the measurement was in rads. [意味] ラジアン, ラジアン角 ; [同義語] radian ; [上位語] angular unit ; [同義語群] 13612042-n" [名詞] a unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material [例] The rad is a unit of absorbed ionizing radiation. [例] The radiation exposure was measured in rads. [例] They measured the radiation in rads. [意味] ラド ; [上位語] radioactivity unit ; [同義語群] 13646557-n