R
Symbol.
the 18th in order or in a series, or, when I is omitted, the 17th.
Biochemistry.
arginine.
Physics.
universal gas constant.
registered trademark: written as superscript ® following a name registered with the U.S. Patent and Trademark Office.
British Dictionary definitions for registered trademark (1 of 3)
British Dictionary definitions for registered trademark (2 of 3)
r
R
/ (ɑː) /
noun plural r's, R's or 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
British Dictionary definitions for registered trademark (3 of 3)
R
symbol for
Medical definitions for registered trademark (1 of 2)
r
abbr.
racemic
Medical definitions for registered trademark (2 of 2)
R
abbr.
right
radical (usually an alkyl or aryl group)
respiration
respiratory exchange ratio
or r
roentgen
Scientific definitions for registered trademark (1 of 2)
r
Abbreviation of radius
Scientific definitions for registered trademark (2 of 2)
R
The symbol for resistance.
Idioms and Phrases with registered trademark
R
see three R's.