transition

transition definition - medical

tran·si·tion (trăn-zĭshˈən)

noun
  1. A period during childbirth that precedes the expulsive phase of labor, characterized by strong uterine contractions and nearly complete cervical dilation.
  2. A point mutation in a polynucleic acid, in which a pyrimidine is replaced by another pyrimidine, or a purine is replaced by another purine.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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