1. r
noun. ['ˈɑːr'] the 18th letter of the Roman alphabet.
Synonyms
- letter
- alphabetic character
- letter of the alphabet
- Latin alphabet
- Roman alphabet
Antonyms
- longness
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Words that Rhyme with R
- ahr
- ar
- r.
How do you pronounce r?
Pronounce r as ɑr.
US - How to pronounce r in American English
UK - How to pronounce r in British English
2. R._J._Mitchell
noun. English aeronautical engineer (1895-1937).
Synonyms
- Mitchell
3. R._B._Cattell
noun. American psychologist (born in England) who developed a broad theory of human behavior based on multivariate research (1905-1998).
Synonyms
- Ray Cattell
- Raymond Bernard Cattell
- Raymond B. Cattell
4. CD-R
noun. a compact disc on which you can write only once and thereafter is read-only memory.
Synonyms
- CD-WO
- compact disk
- CD
- compact disc
- compact disc recordable
5. R-2
noun. street names for flunitrazepan.
Synonyms
- roach
- roofy
- Mexican valium
- Rohypnol
- rope
- forget me drug
- circle
- rophy
Antonyms
- stay in place
6. R._Buckminster_Fuller
noun. United States architect who invented the geodesic dome (1895-1983).
Synonyms
- Buckminster Fuller
- Fuller
7. 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.
Synonyms
- roentgen
8. R
noun. the 18th letter of the Roman alphabet.
Synonyms
- letter
- alphabetic character
- letter of the alphabet
- Latin alphabet
- Roman alphabet
Antonyms
- unstable
- changeable
- variable
- inconstant
9. r
noun. ['ˈɑːr'] the length of a line segment between the center and circumference of a circle or sphere.
Synonyms
- radius of curvature
- semidiameter
- diam
- radius
- length
Antonyms
- short
- shortness
- permanence
- long
10. 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.
Synonyms
- universal gas constant
- gas constant
Antonyms
- discontinuous