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Medical Term:


Pronunciation: myū-tā′shŭn


  1. A change in the chemistry of a gene that is perpetuated in subsequent divisions of the cell in which it occurs; a change in the sequence of base pairs in the chromosomal molecule.
  2. De Vries, term for the sudden production of a species, as distinguished from variation.

[L. muto, pp. -atus, to change]