R 1
(also r )
■ noun ( plural Rs or R's )
1》 the eighteenth letter of the alphabet.
2》 denoting the next after Q in a set of items, categories, etc.
Phrases
the R months the months September to April, considered to be the season for eating oysters.
the three Rs reading, writing, and arithmetic, regarded as the fundamentals of learning.
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R 2
■ abbreviation
1》 rand.
2》 (in names of sports clubs) Rangers or Rovers.
3》 Réaumur (a temperature scale, now obsolete).
4》 Regina or Rex.
5》 ( ® ) registered as a trademark.
6》 (in the US) Republican.
7》 N. Amer. (in film classification) restricted (to viewers over a certain age).
8》 (on a gear shift) reverse.
9》 ( R. ) River.
10》 roentgen(s).
11》 Romania (international vehicle registration).
12》 rook (in chess).
13》 Cricket (on scorecards) run(s).
■ symbol
1》 Chemistry an unspecified organic radical.
2》 electrical resistance.