Usually means: Protective membrane surrounding the heart.
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We found 9 dictionaries that define the word heart sac:

General (5 matching dictionaries)
  1. heart sac: Merriam-Webster
  2. heart-sac: Wordnik
  3. heart sac: Dictionary.com
  4. heart sac: TheFreeDictionary.com
  5. heart sac: Wiktionary

Computing (1 matching dictionary)
  1. heart sac: Encyclopedia

Medicine (3 matching dictionaries)
  1. online medical dictionary (No longer online)
  2. Heart sac: Scleroderma
  3. heart sac: Medical dictionary

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Definitions from Wiktionary (heart sac)

▸ noun:  Synonym of pericardium

Similar:
theca cordis, electrocardium, echocardiology, cardioangiography, pericartilage, one's heart in one's throat, atrioventricular bundle, brachycardia, bradyrhythmia, telecardiogram, more...

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Similar:
theca cordis, electrocardium, echocardiology, cardioangiography, pericartilage, one's heart in one's throat, atrioventricular bundle, brachycardia, bradyrhythmia, telecardiogram, more...



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