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noun, plural R’s or Rs, r’s or rs.
1.
the 18th letter of the English alphabet, a consonant.
2.
any spoken sound represented by the letter R or r, as in ran, carrot, or rhyme.
3.
something having the shape of R .
4.
a written or printed representation of the letter R or r.
5.
a device, as a printer’s type, for reproducing the letter R or r.
6.
three R’s.
verb
1.
Informal. are :
Oysters R in season.
1.
reis.
2.
rupees.
1.
Recording Secretary.
2.
Reformed Spelling.
3.
Revised Statutes.
4.
Royal Society.
1.
right side.
abbreviation
1.
Serbia
symbol
1.
rupees
abbreviation (in Britain)
1.
Royal Society
noun (pl) r’s, R’s, Rs
1.
the 18th letter and 14th consonant of the modern English alphabet
2.
a speech sound represented by this letter, in English usually an alveolar semivowel, as in red
3.
See three Rs
symbol
1.
(chem) radical
2.
(currency)

rand
rupee

3.
Réaumur temperature (scale)
4.
(physics, electronics) resistance
5.
roentgen or röntgen
6.
(chess) rook
7.
Royal
8.
(chem) gas constant
9.
(in the US and Australia)

restricted exhibition (used to describe a category of film certified as unsuitable for viewing by anyone under the age of 18)
(as modifier): an R film

r abbr.
racemic

R abbr.

radical (usually an alkyl or aryl group)

respiration

respiratory exchange ratio

or r roentgen

r
Abbreviation of radius
R
The symbol for resistance.

1. Record Separator
2. Recommended Standard, a series of EIA standards including EIA-232.
rs
Reported in Senate
Rs
Solar Radius
RS
1.
recording secretary
2.
Royal Society
r
1.
correlation coefficient
2.
radius
3.
resistance
R
1.
gas constant
2.
radical
3.
rain
4.
range
5.
Réaumur
6.
receiver
7.
registered trademark
8.
Republican
9.
response
10.
restricted (children under 17 must be accompanied by a parent or guardian)
11.
right
12.
roentgen
13.
rook
14.
run
R.S.
Revised Statutes
see: three R’s