S

/ɛs/

Definitions of S

1. noun

   the 19th letter of the Roman alphabet
   synonyms: s

   type of:

   alphabetic character, letter, letter of the alphabet

   the conventional characters of the alphabet used to represent speech
2. noun

   the cardinal compass point that is at 180 degrees
   synonyms: due south, south, southward

   type of:

   cardinal compass point

   one of the four main compass points
3. noun

   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: atomic number 16, sulfur, sulphur

   types:

   brimstone, native sulfur, native sulphur

   an old name for sulfur

   type of:

   chemical element, element

   any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
4. noun

   (thermodynamics) a thermodynamic quantity representing the amount of energy in a system that is no longer available for doing mechanical work
   synonyms: entropy, randomness

   types:

   conformational entropy

   entropy calculated from the probability that a state could be reached by chance alone

   type of:

   physical property

   any property used to characterize matter and energy and their interactions
5. noun

   a unit of conductance equal to the reciprocal of an ohm
   synonyms: mho, reciprocal ohm, siemens

   type of:

   conductance unit

   a measure of a material's ability to conduct an electrical charge