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Meaning of parity

par•i•ty

Pronunciation: (par'i-tē), [key]
— n.
  1. equality, as in amount, status, or character.
  2. equivalence; correspondence; similarity; analogy.
    1. equivalence in value in the currency of another country.
    2. equivalence in value at a fixed ratio between moneys of different metals.
    1. a property of a wave function, expressed as +1 or −1 and noting the relation of the given function to the function formed when each variable is replaced by its negative, +1 indicating that the functions are identical and −1 that the second function is the negative of the first.
    2. Also calledintrinsic parity.a number +1 or −1 assigned to each kind of elementary particle in such a way that the product of the parities of the particles in a system of particles multiplied by the parity of the wave function describing the system is unchanged when particles are created or annihilated.
  3. a system of regulating prices of farm commodities, usually by government price supports, to provide farmers with the same purchasing power they had in a selected base period.
  4. the condition of the number of items in a set, particularly the number of bits per byte or word, being either even or odd: used as a means for detecting certain errors.

par•i•ty

Pronunciation: (par'i-tē), [key]
— n. Obstet.
  1. the condition or fact of having borne offspring.
  2. para (def. 1).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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