s

noun

1. 1/60 of a minute; the basic unit of time adopted under the Systeme International d’Unites

   Synonyms

   • second, sec

   Less specific

   • time unit, unit of time

   More specific

   • leap second

   Parts

   • millisecond, msec

   Part of

   • minute, min

2. 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

   • sulfur, S, sulphur, atomic number 16

   Less specific

   • chemical element, element

   More specific

   • brimstone, native sulfur, native sulphur

   Made from

   • sulfide, sulphide, vitriol, oil of vitriol, sulfuric acid, sulphuric acid

3. the cardinal compass point that is at 180 degrees

   Synonyms

   • south, due south, southward, S

   Less specific

   • cardinal compass point

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

   Synonyms

   • mho, siemens, reciprocal ohm, S

   Less specific

   • conductance unit

5. the 19th letter of the Roman alphabet

   Synonyms

   • S

   Less specific

   • letter, letter of the alphabet, alphabetic character

   Member of

   • Roman alphabet, Latin alphabet

6. (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”

   Synonyms

   • randomness, entropy, S

   Less specific

   • physical property

   More specific

   • conformational entropy