(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";
the 19th letter of the Roman alphabet;
a unit of conductance equal to the reciprocal of an ohm;
the cardinal compass point that is at 180 degrees;
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);
1/60 of a minute; the basic unit of time adopted under the Systeme International d''Unites;
