S
— Noun
– English
～ an abundant tasteless odorless multivalent nonmetallic element; best known in yellow crystals; occurs in many sulphide and sulphate minerals and even in native form (especially in volcanic regions)
s
— Noun
– English
～ 1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites
S/N
— Noun
– English
～ the ratio of signal intensity to noise intensity
S
— Noun
– English
～ (thermodynamics) a thermodynamic quantity representing the amount of energy in a system that is no longer available for doing mechanical work; "entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity"