Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Medical Dictionary

atelectasis

play
noun at·el·ec·ta·sis \ˌat-əl-ˈek-tə-səs\

Medical Definition of atelectasis

plural atelectases \-ˌsēz\play

  1. :  collapse of the expanded lung; also :  defective expansion of the pulmonary alveoli at birth

atelectatic \-ek-ˈtat-ik\play adjective



Learn More about atelectasis


Seen and Heard

What made you want to look up atelectasis? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

immature or lacking adult sophistication

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

angry prompt oily maudlin
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ