HyperDic: r

English > 4 senses of the word R / r:
NOUNquantityR, roentgena unit of radiation exposure
quantityR, gas constant, universal gas constant(physics) the universal constant in the gas equation
communicationR / rthe 18th letter of the Roman alphabet
attributer, radiusthe length of a line segment between the center and circumference of a circle or sphere
R / r > pronunciation
RhymesAdar ... Zanzibar: 81 rhymes with aar...
English > R: 4 senses > noun 1, quantity
MeaningA unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air.
Broaderradioactivity unitA measure of radioactivity
English > R: 4 senses > noun 2, quantity
Meaning(physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole.
Synonymsgas constant, universal gas constant
Categoryphysics, natural philosophyThe science of matter and energy and their interactions
BroaderconstantA number representing a quantity assumed to have a fixed value in a specified mathematical context
English > R / r: 4 senses > noun 3, communication
MeaningThe 18th letter of the Roman alphabet.
Member ofRoman alphabet, Latin alphabetThe alphabet evolved by the ancient Romans which serves for writing most of the languages of western Europe
Broaderletter, letter of the alphabet, alphabetic characterThe conventional characters of the alphabet used to represent speech
English > r: 4 senses > noun 4, attribute
MeaningThe length of a line segment between the center and circumference of a circle or sphere.
Part ofdiameter, diamThe length of a straight line passing through the center of a circle and connecting two points on the circumference
Narrowerradius of curvatureThe radius of the circle of curvature
semidiameterThe apparent radius of a celestial body when viewed as a disc from the earth
BroaderlengthThe linear extent in space from one end to the other
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