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[ploo r-uh] /ˈplʊər ə/
noun, plural pleurae
[ploo r-ee] /ˈplʊər i/ (Show IPA),
for 1.
Anatomy, Zoology. a delicate serous membrane investing each lung in mammals and folded back as a lining of the corresponding side of the thorax.
plural of pleuron.
Origin of pleura
1655-65; < New Latin < Greek pleurá (singular) side, rib


[ploo r-on] /ˈplʊər ɒn/
noun, plural pleura
[ploo r-uh] /ˈplʊər ə/ (Show IPA).
the lateral plate or plates of a thoracic segment of an insect.
First recorded in 1700-10, pleuron is from the Greek word pleurón rib, (plural) side Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for pleura


noun (pl) pleurae (ˈplʊəriː)
the thin transparent serous membrane enveloping the lungs and lining the walls of the thoracic cavity
the plural of pleuron
Derived Forms
pleural, adjective
Word Origin
C17: via Medieval Latin from Greek: side, rib


noun (pl) pleura (ˈplʊərə)
the part of the cuticle of arthropods that covers the lateral surface of a body segment
Word Origin
C18: from Greek: side
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 pleura

early 15c., medical Latin, from Greek pleura "side of the body, rib," also "flank of an army, page of a book," of unknown origin.

Online Etymology Dictionary, © 2010 Douglas Harper
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pleura in Medicine

pleura pleu·ra (plur'ə)
n. pl. pleu·rae (plur'ē)
The thin serous membrane that envelops each lung and folds back to make a lining for the chest cavity.

pleu'ral 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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pleura in Science
Plural pleurae (plr'ē)
A membrane that encloses each lung and lines the chest cavity.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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