R
01
半径, 半径
the length of a line segment between the center and circumference of a circle or sphere
02
ローマ字の18番目の文字, 文字R
the 18th letter of the Roman alphabet
03
レントゲン, 放射線被曝の単位
a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air
04
普遍気体定数, 気体定数R
(physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole
r
01
R指定, 17歳未満は保護者の同伴が必要
describing a motion picture that people under the age of 17 need a guardian or parent in order to watch it
Dialect
American
American
