Usually means: Curved section of main artery.
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We found 20 dictionaries that define the word aortic arch:

General (12 matching dictionaries)
  1. aortic arch: Merriam-Webster
  2. aortic arch: American Heritage Dictionary of the English Language
  3. aortic arch: Vocabulary.com
  4. aortic arch: Wiktionary
  5. aortic arch: Infoplease Dictionary
  6. aortic arch: Dictionary.com
  7. Aortic arch: Wikipedia, the Free Encyclopedia
  8. aortic arch: Rhymezone
  9. aortic arch: FreeDictionary.org
  10. aortic arch: Mnemonic Dictionary
  11. aortic arch: TheFreeDictionary.com
  12. aortic arch: Merriam-Webster

Business (1 matching dictionary)
  1. aortic arch: Financial dictionary

Computing (1 matching dictionary)
  1. aortic arch: Encyclopedia

Medicine (6 matching dictionaries)
  1. aortic arch: Merriam-Webster Medical Dictionary
  2. Dorland's Illustrated Medical Dictionary (No longer online)
  3. Aortic arch, Arch, aortic: MedTerms.com Medical Dictionary
  4. online medical dictionary (No longer online)
  5. aortic arch: Medical dictionary
  6. Aortic arch, Arch, aortic: Drug Medical Dictionary

Definitions from Wiktionary (aortic arch)

noun:  (anatomy) The curving portion of the aorta that bends between the ascending aorta and the descending aorta, from which the brachiocephalic artery, left carotid artery, and left subclavian artery arise.
noun:  (embryology) One of a series of six paired embryonic vascular structures which connect the ventral arterial system lying anterior to the heart to the dorsal arterial system above the digestive tract, persist in adult fishes but are reduced or much modified in the adult of higher forms, and give rise to the great arteries of the neck and head.

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