From WordNet (r) 3.0 (2006):
s
n 1: 1/60 of a minute; the basic unit of time adopted under the
Systeme International d'Unites [syn: second, sec, s]
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) [syn: sulfur, S,
sulphur, atomic number 16]
3: the cardinal compass point that is at 180 degrees [syn:
south, due south, southward, S]
4: a unit of conductance equal to the reciprocal of an ohm [syn:
mho, siemens, reciprocal ohm, S]
5: the 19th letter of the Roman alphabet [syn: S, s]
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" [syn: randomness, entropy, S]