S

noun

1. 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)
2. 1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites
3. the cardinal compass point that is at 180 degrees
4. the 19th letter of the Roman alphabet
5. a unit of conductance equal to the reciprocal of an ohm
6. the 19th letter of the Roman alphabet
7. (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"