R (disambiguation)

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R is the eighteenth letter of the Latin alphabet.

R or r may also refer to:

Science[edit]

Biology and medicine[edit]

Astronomy[edit]

Physics[edit]

Temperature scales[edit]

Chemistry[edit]

  • Gas constant (R), in chemistry
  • R, one of two chiral center configurations in the R/S system
  • Side chain (an unspecified group of atoms), in a chemical or structural formula

Mathematics[edit]

Technology and engineering[edit]

Computing[edit]

Arts and entertainment[edit]

Music[edit]

Film[edit]

Television[edit]

Video games[edit]

Organisations[edit]

Transportation[edit]

Other uses[edit]

See also[edit]