Definitions for R

R, rɑr(n.)(pl.)Rs; R's, rs; r's.

Chem.radical.
Category: Chemistry
Math.ratio.
Category: Math
regular: a man's suit or coat size.
Category: Biochemistry, Clothing
restricted: a motion-picture rating advising that children under 17 will not be admitted unless accompanied by an adult.
Category: Showbiz
Ref: Compare G (def. 2), 3 5 NC-17 , PG, 2 PG-13, 3 X (def. 7). 4 8
right.
Category: Showbiz
roentgen.
Category: Physics

R^*

the 18th in order or in a series.
arginine.
Category: Biochemistry
registered trademark: written as superscript ® following a name registered with the U.S. Patent and Trademark Office.
Elect.resistance.
Category: Electronics

^* Symbol..

r(pl.)

r^*

the intrinsic rate of increase of a population, equivalent to the difference between the birth and death rates divided by the number of individuals in the population.
Category: Ecology
Ref: Also called Malthusian parameter.

^* Ecol..

< L recipe

r.(pl.)

roentgen, R(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
gas constant, universal gas constant, R(noun)
(physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole
R, r(noun)
the 18th letter of the Roman alphabet
radius, r(noun)
the length of a line segment between the center and circumference of a circle or sphere

R(u)
r, the eighteenth letter of the English alphabet, is a vocal consonant. It is sometimes called a semivowel, and a liquid. See Guide to Pronunciation, // 178, 179, and 250-254

R
(a) Abbreviation and symbol for Reamur, as 10º R., meaning 10º by the Reamur thermometer. (See Reamur Scale.) (b) Symbol for resistance, as in the expression of Ohm's Law C=E. (rho, Greek r) Symbol for specific resistance.

Citation

"R." Definitions.net. STANDS4 LLC, 2013. Web. 23 May 2013. <http://www.definitions.net/definition/R>.