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noun: 1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites

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)

noun: the cardinal compass point that is at 180 degrees

noun: a unit of conductance equal to the reciprocal of an ohm

noun: the 19th letter of the Roman alphabet

noun: (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"