S is the nineteenth letter of the English alphabet.
S may also refer to:
History
Language and linguistics
Transportation
Mathematics and logic
Physics and chemistry
- 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
- 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
People
Arts and entertainment
Books
Music
- 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
- 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
Automobiles
Production models
Prototypes and concepts
Series and trims
- 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
See also
Topics referred to by the same term
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