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apneustic breathing

[ăp-nōō′stĭk]
n.
  1. A series of slow, deep inspirations, each one held for 30 to 90 seconds, after which the air is suddenly expelled by the elastic recoil of the lung.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.