Sa
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Sa or sa may stand for:
- arsine, a toxic gas
- the ancient Egyptian hieroglyph meaning "protection" (see sa (hieroglyph))
- samarium, until the 1920s, when the symbol Sm became universal
- Sanskrit language (ISO 639 alpha-2, sa)
- sine anno, used in bibliographies to indicate that a publication date is unknown
See also: SA
it:Sa