Pa

Pa definition - medical

Pa

The symbol for the element protactinium.
PA definition - medical

PA

abbreviation
  1. physician's assistant
  2. posteroanterior
  3. pulmonary artery

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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