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R - Dictionary Definition and Overview |
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R : (noun)
1: a unit of radiation exposure; the dose of ionizing radiation
that will produce 1 electrostatic unit of electricity in
1 cc of dry air [syn: roentgen, R]
2: (physics) the universal constant in the gas equation:
pressure times volume = R times temperature; equal to
8.3143 joules per kelvin per mole [syn: gas constant, universal
gas constant, R]
3: the 18th letter of the Roman alphabet [syn: R]
4: the length of a line segment between the center and
circumference of a circle or sphere [syn: radius]
Based on WordNet 2.0
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R : \R\ ([aum]r).
R, the eighteenth letter of English alphabet, is a vocal
consonant. It is sometimes called a semivowel, and a liquid.
See Guide to Pronunciation, [sect][sect] 178, 179, and
250-254. ``R is the dog's letter and hurreth in the sound.''
--B. Jonson.
Note: In words derived from the Greek language the letter h
is generally written after r to represent the aspirated
sound of the Greek "r, but does not affect the
pronunciation of the English word, as rhapsody,
rhetoric. The English letter derives its form from the
Greek through the Latin, the Greek letter derived from
the Ph[oe]nician, which, it is believed, is ultimately
of Egyptian origin. Etymologically, R is most closely
related to l, s, and n; as in bandore, mandole; purple,
L. purpura; E. chapter, F. chapitre, L. capitulum; E.
was, were; hare, G. hase; E. order, F. ordre, L. ordo,
ordinis; E. coffer, coffin.
The three Rs, a jocose expression for reading, (w)riting,
and (a)rithmetic, -- the fundamentals of an education.
Based on WordNet (r) 2.0 (August 2003)
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Example Usage of R |
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EOmidi: Completely and utteRly buRned out. I need some R&R stat |
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mafiosachelly: - O que é um monte de maconha em cima de um joRnal? R: Baseado em fatos Reais. RT @SouMaconheiRo |
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ABCeCe: @Renaysaid that's a diffeRent question. Most people assume all otheRs R sexually active. U can't stop ppls assumptions. |
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