Definitions for aortic arch
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Random House Webster's College Dictionary
aor′tic arch′(n.)
one member of a series of paired curved blood vessels that arise in the embryo from the ventral aorta, pass around the pharynx through the branchial arches, and join with the dorsal aorta to form the great vessels of the head and neck.
Origin of aortic arch:
1900–05
Princeton's WordNet
aortic arch(noun)
the part of the aorta that arches and turns downward
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"aortic arch." Definitions.net. STANDS4 LLC, 2013. Web. 25 May 2013. <http://www.definitions.net/definition/aortic arch>.