Noun

1. The united states intelligence agency that protects current and former presidents and vice presidents and their immediate families and protects distinguished foreign visitors; detects and apprehends counterfeiters; suppresses forgery of government securities and documents
2. Special police force in nazi germany founded as a personal bodyguard for adolf hitler in 1925; the ss administered the concentration camps
3. 1/60 of a minute; the basic unit of time adopted under the systeme international d'unites
4. 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)
5. The cardinal compass point that is at 180 degrees
6. A unit of conductance equal to the reciprocal of an ohm
7. The 19th letter of the roman alphabet
8. (thermodynamics) a thermodynamic quantity representing the amount of energy in a system that is no longer available for doing mechanical work