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r n. (physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole
r n. a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air
r n. the 18th letter of the Roman alphabet
r n. the length of a line segment between the center and circumference of a circle or sphere
r and b n. a combination of blues and jazz that was developed in the United States by Black musicians; an important precursor of rock 'n' roll
r-2 n. street names for flunitrazepan
r. b. cattell n. American psychologist (born in England) who developed a broad theory of human behavior based on multivariate research (1905-1998)
r. buckminster fuller n. United States architect who invented the geodesic dome (1895-1983)
r. j. mitchell n. English aeronautical engineer (1895-1937)
r.c. a. of or relating to or supporting Romanism
r.v. n. a motorized wheeled vehicle used for camping or other recreational activities
ra n. (astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the intersection of the hour circle that passes through an object in the sky; usually expressed in hours and minutes and seconds; used with declination to specify positions on the celestial sphere
ra n. an intensely radioactive metallic element that occurs in minute amounts in uranium ores
ra n. ancient Egyptian sun god with the head of a hawk; a universal creator; he merged with the god Amen as Amen-Ra to become the king of the gods
rabat n. the capital of Morocco; located in the northwestern on the Atlantic coast
 
English 'word lottery' pick

inattentiveness : n a lack of attentiveness (as to children or helpless people); n the trait of not being considerate and thoughtful of others

 
Based on WordNet 2.1, Copyright © 2005 Princeton University
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