S — English Dictionary

Character

1. The nineteenth letter of the English alphabet, called ess and written in the Latin script.

   Usage

   • letter
   • uppercase

Numeral

1. The nineteenth numeral symbol of the English alphabet, called ess and written in the Latin script.

   Usage

   • uppercase
   • number

Proper noun

1. An axiomatic set theory, developed by logician George Boolos, in which several of the axioms of ZF are derivable as theorems.

   Examples

   S has no axiom of extensionality and identity is absent from the other S axioms.

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)

   Synonyms

   sulfursulphuratomic number 16

   Broader terms

   chemical elementelement

2. the cardinal compass point that is at 180 degrees

   Synonyms

   southdue southsouthward

   Broader terms

   cardinal compass point

3. a unit of conductance equal to the reciprocal of an ohm

   Synonyms

   mhosiemensreciprocal ohm

   Broader terms

   conductance unit

4. the 19th letter of the Roman alphabet

   Synonyms

   s

   Broader terms

   letterletter of the alphabetalphabetic character

5. (thermodynamics) a thermodynamic quantity representing the amount of energy in a system that is no longer available for doing mechanical work

   Synonyms

   randomnessentropy

   Broader terms

   physical property

   Examples

   entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity