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Definition of "expiratory" [ex•pir•a•to•ry]

  • Of, relating to, or involving the expiration of air from the lungs. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "expiratory" in a sentence
  • "The Strive study tested the drug in 161 patients with the mutation and showed that a measure of air exhaled, called forced expiratory volume, increased after 24 weeks and 48 weeks in comparison to placebo."
  • "In the primary goal of the trial, the drug showed an improvement in forced expiratory volume of 10.6% in those on the drug through 24 weeks and 10.5% through 48 weeks."
  • "A small, inexpensive device that measures how fast air moves out of the child's lungs when a child exhales; it measures the peak expiratory flow (PEF) which is an indicator of airway size."