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Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Pericardium
is always a great word to know.
So is cavity. Does it mean:
| either one of the seventh pair of cranial nerves composed of motor fibers that control muscles of the face except those used in chewing |
| a hollow space within the body, an organ or a bone |
Collins
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History
pericardium
1570s, Latinized form of Gk. perikardion "membrane around the heart" (Galen), from peri (prep.) "around, about" + kardia "heart" (see heart).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary
pericardium per·i·car·di·um (pěr'ĭ-kär'dē-əm)
n. pl. per·i·car·di·a (-dē-ə)
The fibroserous sac enclosing the heart and the roots of the great vessels, consisting of two layers: the visceral layer or epicardium, immediately surrounding the heart; and the outer parietal layer, which forms the sac and is lined with a serous membrane. Also called heart sac, theca cordis.
per'i·car'di·al (-dē-əl) or per'i·car'di·ac' (-dē-āk') 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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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
pericardium  (pěr'ĭ-kär'dē-əm) Pronunciation Key
Plural pericardia The membrane sac that encloses the heart in vertebrate animals. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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