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Medical Dictionary

1

yawn

play
intransitive verb \ˈyȯn, ˈyän\

Medical Definition of yawn

  1. :  to open the mouth wide and take a deep breath usually as an involuntary reaction to fatigue or boredom




2

yawn

noun

Medical Definition of yawn

  1. :  an opening of the mouth wide while taking a deep breath often as an involuntary reaction to fatigue or boredom





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