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[at-l-ek-tuh-sis] /ˌæt lˈɛk tə sɪs/
noun, Pathology.
incomplete expansion of the lungs at birth, as from lack of breathing force.
collapse of the lungs, as from bronchial obstruction.
Origin of atelectasis
1855-60; < New Latin; ateliosis + Greek éktasis a stretching out, equivalent to ek- ec- + ta-, variant stem of teínein to stretch + -sis -sis
Related forms
[at-l-ek-tat-ik] /ˌæt l ɛkˈtæt ɪk/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for atelectasis


failure of the lungs to expand fully at birth
collapse of the lung or a part of the lung, usually caused by bronchial obstruction
Word Origin
C19: New Latin, from Greek atelēs imperfect + ektasis extension
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for atelectasis

"incomplete expansion of the lungs," 1836, medical Latin, from Greek ateles "imperfect, incomplete," literally "without an end," (from a-, privative prefix, + telos "completion") + ektosis "extention." Related: Atelectatic.

Online Etymology Dictionary, © 2010 Douglas Harper
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atelectasis in Medicine

atelectasis at·e·lec·ta·sis (āt'l-ěk'tə-sĭs)

  1. The absence of gas from all or a part of the lungs, due to failure of expansion or resorption of gas from the alveoli.

  2. A congenital condition characterized by the incomplete expansion of the lungs at birth.

at'e·lec·tat'ic (-ěk-tāt'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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