Meaning of cofactor

co•fac•tor

Pronunciation: (kō'fak"tur), [key]
— n.
  1. any of various organic or inorganic substances necessary to the function of an enzyme.
    1. a prefactor or postfactor.
    2. the product of the minor of a given element of a matrix times −1 raised to the power of the sum of the indices of the row and column crossed out in forming the minor.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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