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R US English

The eighteenth letter of the alphabet

R1 US English

The eighteenth letter of the alphabet

R2 US English

Rand

r US English

Recto

DVD+R US English

A blank DVD on which data, including music and movies, can be permanently recorded and read using the DVD+R format

correlation coefficient US English

A number between −1 and +1 calculated so as to represent the linear dependence of two variables or sets of data

r in correlation coefficient US English

A number between −1 and +1 calculated so as to represent the linear dependence of two variables or sets of data

r in R1 US English

The eighteenth letter of the alphabet

roentgen US English

A unit of ionizing radiation, the amount producing one electrostatic unit of positive or negative ionic charge in one cubic centimeter of air under standard conditions

R in roentgen US English

A unit of ionizing radiation, the amount producing one electrostatic unit of positive or negative ionic charge in one cubic centimeter of air under standard conditions

gas constant US English

The constant of proportionality in the gas equation. It is equal to 8.314 joule kelvin1 mole1

R in gas constant US English

The constant of proportionality in the gas equation. It is equal to 8.314 joule kelvin1 mole1

R. in R2 US English

River (chiefly on maps)

R & R US English

Rest and recreation

A & R US English

Artist(s) and repertory, used to denote employees of a record company who select and sign new artists

R & B US English

short for rhythm and blues.

R & D US English

Research and development

L/R US English

Left/right

CD-R US English

A blank compact disc which can be recorded on once only

DVD-R US English

A blank DVD on which data, including music and movies, can be permanently recorded and read using the DVD-R format

Ker(r) in kerria US English

An eastern Asian shrub of the rose family, cultivated for its yellow flowers, especially the double-flowered variety

R-value US English

The capacity of an insulating material to resist heat flow. The higher the R-value, the greater the insulating power

R 'n' R in R & R US English

Rock and roll

Firth, J. R. US English

(1890–1960), English linguist; full name John Rupert Firth. Firth was noted for his contributions to linguistic semantics and prosodic phonology

James, M. R. US English

(1862–1936), English scholar and writer of ghost stories; full name Montague Rhodes James. He is noted for eerie tales collected in such volumes as Ghost Stories of an Antiquary (1904)

Laing, R. D. US English

(1927–89), Scottish psychiatrist; full name Ronald David Laing. He was known for his controversial views on insanity and, in particular, on schizophrenia

the R months in R1 US English

The months with R in their names (September to April), considered to be the season for eating oysters

the R months US English

The months with R in their names (September to April), considered to be the season for eating oysters

AR US English

Accounts receivable

rhythm and blues US English

A form of popular music of African-American origin that arose during the 1940s from blues, with the addition of driving rhythms taken from jazz. It was an immediate precursor of rock and roll

R & B in rhythm and blues US English

A form of popular music of African-American origin that arose during the 1940s from blues, with the addition of driving rhythms taken from jazz. It was an immediate precursor of rock and roll

R's in R1 US English

The eighteenth letter of the alphabet

Bennett, R. B. US English

(1870–1947), Canadian Conservative statesman; prime minister 1930–35; full name Richard Bedford Bennett

Leavis, F. R. US English

(1895–1978), English literary critic; full name Frank Raymond Leavis. Founder and editor of the quarterly Scrutiny (1932–53), he emphasized the value of critical study of English literature to preserving cultural continuity. Notable works: The Great Tradition (1948)

Narayan, R. K. US English

(1906–2001), Indian novelist and short-story writer; full name Rasipuram Krishnaswamy Narayan. Many of his novels are set in Malgudi, an imaginary small Indian town. Notable works: Swami and Friends (1935), The Man-Eater of Malgudi (1961), and The Painter of Signs (1977)

Tolkien, J. R. R. US English

(1892–1973), British novelist and literary scholar, born in South Africa; full name John Ronald Reuel Tolkien. He is known for The Hobbit (1937) and The Lord of the Rings (1954–55), fantasy adventures set in Middle Earth

Ballantyne, R. M. US English

(1825–94), Scottish author; full name Robert Michael Ballantyne. He wrote acclaimed adventure stories, such as The Coral Island (1857)

Blackmore, R. D. US English

(1825–1900), English novelist and poet; full name Richard Doddridge Blackmore. He is noted for his romantic novel Lorna Doone (1869)

James, C. L. R. US English

(1901–89), Trinidadian historian, journalist, political theorist, and novelist; full name Cyril Lionel Robert James. After working as a cricket columnist he established a reputation as a historian with his study of the Haitian revolution, Black Jacobins (1938)

Wilson, C. T. R. US English

(1869–1959), Scottish physicist; full name Charles Thomson Rees Wilson. After inventing the cloud chamber in 1895, he improved the design and by 1911 had a chamber in which the track of an ion could be made visible. This became a major tool of particle physicists. Nobel Prize for Physics (1927), shared with Arthur Compton

Mitchell, R. J. US English

(1895–1937), English aeronautical engineer; full name Reginald Joseph Mitchell. He designed the Spitfire fighter aircraft

Narayanan, K. R. US English

(1920–2005), Indian statesman, President 1997–2002; full name Kocheril Raman Narayanan. A member of the Congress party, Narayanan served as Vice President 1992-7

Murrow, Edward R. US English

(1908–65), US journalist; born Egbert Roscoe Murrow. He broadcast from London during the Blitz of World War II, ending each program with “Good night, and good luck.” He later created the radio series Hear It Now (1950–51) and the television series See It Now (1951–58). He was also well known for his television interview series Person to Person (1953–59)

Hewlett, William R. US English

(1913–2001), US electrical engineer, inventor, and businessman; full name William Reddington Hewlett. He invented an audio oscillator and with David Packard (1912–96) cofounded the Hewlett-Packard Company in 1939

Williams, J. P. R. US English

(B.1949), Welsh rugby union player; full name John Peter Rhys Williams. One of the leading full backs of the 1970s, Williams played for his country and for the British Lions

Fuller, R. Buckminster US English

(1895–1983), US designer and architect; full name Richard Buckminster Fuller. He is best known for his invention of the geodesic dome and also for his ideals of using the world’s resources with maximum purpose and least waste

R. alba in mignonette US English

A herbaceous plant with spikes of small fragrant greenish flowers

R. acris in buttercup US English

A herbaceous plant with bright yellow cup-shaped flowers, common in grassland and as a garden weed. All kinds are poisonous and generally avoided by livestock

R. elata in royal palm US English

A New World palm that is widely cultivated as a roadside tree


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