noun, plural R’s or Rs, r’s or rs.
the 18th letter of the English alphabet, a consonant.
any spoken sound represented by the letter R or r, as in ran, carrot, or rhyme.
something having the shape of R .
a written or printed representation of the letter R or r.
a device, as a printer’s type, for reproducing the letter R or r.
Informal. are :
Oysters R in season.
abbreviation (in Britain)
noun (pl) r’s, R’s, Rs
the 18th letter and 14th consonant of the modern English alphabet
a speech sound represented by this letter, in English usually an alveolar semivowel, as in red
See three Rs
Réaumur temperature (scale)
(physics, electronics) resistance
roentgen or röntgen
(chem) gas constant
(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
radical (usually an alkyl or aryl group)
respiratory exchange ratio
or r roentgen
Abbreviation of radius
The symbol for resistance.
1. Record Separator
2. Recommended Standard, a series of EIA standards including EIA-232.
Reported in Senate
restricted (children under 17 must be accompanied by a parent or guardian)
see: three R’s
1. right side. 1. Recording Secretary. 2. Reformed Spelling. 3. Revised Statutes. 4. Royal Society. R.S. Revised Statutes
Renamed EIA-232C (2004-08-02)
communications, standard The EIA equivalent of ITU-T standard V.28. [Difference from EIA-232/EIA-232C?] (1995-03-02)