Pronunciation: (myOO-tā'shun), [key]
1. Biol.
a. a sudden departure from the parent type in one or more heritable characteristics, caused by a change in a gene or a chromosome.
b. an individual, species, or the like, resulting from such a departure.
2. the act or process of changing.
3. a change or alteration, as in form or nature.
4. Phonet.umlaut.
5. Ling.(in Celtic languages) syntactically determined morphophonemic phenomena that affect initial sounds of words.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

mutatemutatis mutandis
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