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1. 1/60 of a minute; the basic unit of time adopted under the Système International d'Unités
   - second, sec
    
2. The 19th letter of the Roman alphabet
   - S

1. A unit of conductance equal to the reciprocal of an ohm
   - mho, siemens, reciprocal ohm
    
2. An abundant tasteless odourless multivalent nonmetallic element; best known in yellow crystals; occurs in many sulphide and sulphate minerals and even in native form (especially in volcanic regions)
   - sulfur [N. Amer], sulphur [Brit, Cdn], atomic number 16
    
3. The cardinal compass point that is at 180 degrees
   - south, due south, southward
    
4. (thermodynamics) a thermodynamic quantity representing the amount of energy in a system that is no longer available for doing mechanical work
   "S increases as matter and energy in the universe degrade to an ultimate state of inert uniformity"
   - randomness, entropy

Derived forms: ss, Ss

Type of: alphabetic character, cardinal compass point, chemical element, conductance unit, element, letter, letter of the alphabet, physical property, time unit, unit of time

Part of: Latin alphabet, min, minute, oil of vitriol, Roman alphabet, sulfide [N. Amer], sulfuric acid [N. Amer], sulphide [Brit, Cdn], sulphuric acid [Brit, Cdn], vitriol

Encyclopedia: S S,M,L,XL S, S, as in Zebatinsky