r contains the following parts

/ɑr/

noun
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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roentgen

type of:
radioactivity unit
noun
(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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gas constant universal gas constant

type of:
constant
noun
the length of a line segment between the center and circumference of a circle or sphere
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radius

type of:
length

part of:
diam diameter
noun
the 18th letter of the Roman alphabet
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type of:
alphabetic character letter letter of the alphabet

Parts of r

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