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raggio, raggio
the length of a line segment between the center and circumference of a circle or sphere
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r, lettera r
the 18th letter of the Roman alphabet
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roentgen, unità di radiazione
a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air
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R (costante universale), R (nell'equazione dei gas)
(physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole
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solo più vecchio
describing a motion picture that people under the age of 17 need a guardian or parent in order to watch it
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