S is the nineteenth letter of the English alphabet.

S may also refer to:

History

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Language and linguistics

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Transportation

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Mathematics and logic

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Physics and chemistry

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  • Sulfur, symbol S, a chemical element
  • s, for second, the SI unit of time
  • S, the symbol for entropy
  • S, a non-SI unit used to designate molecule size named after the Svedberg sedimentation coefficient
  • S, a label that denotes one of two chiral center configurations in the R/S system
  • s, one of the Mandelstam variables, the square of the invariant mass
  • Siemens (unit), the SI derived unit of electric conductance
  • S-block of the periodic table, which includes alkali metals, alkaline earth metals, and hydrogen and helium
  • Spin (physics)
  • s, an abbreviation for solid

Biology and medicine

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  • Serine, a standard amino acid abbreviated as Ser or S
  • ATC code S Sensory organs, a section of the Anatomical Therapeutic Chemical Classification System
  • S phase or synthesis phase, a period in the cell cycle during interphase

Computing

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People

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Arts and entertainment

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Books

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Music

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  • S, the stage name of singer-songwriter and guitarist Jenn Champion
  • S (group), a short-lived South Korean music group active in 2003 and 2014
  • S (EP), a 2001 EP by Japanese musical duo NaNa
  • Numbering of Franz Liszt's works according to Humphrey Searle's catalogue
  • "S" (song), by Japanese band Sid

Television

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  • S, the production code for the 1965 Doctor Who serial The Time Meddler
  • The S logo used for Globo’s weekly movie program SuperCine.

Comics

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Automobiles

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Production models

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Prototypes and concepts

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Series and trims

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  • Acura Type-S, a range of Japanese performance vehicles
  • Audi S, a range of German performance vehicles
  • Honda S series, series of Japanese sports cars
  • Jaguar S, a range of British performance vehicles
  • Saviem S, a range of French medium-duty cab-over trucks

Other uses

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See also

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