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90s Slang You Should Know

primitive costal arch

primitive costal arch in Medicine

primitive costal arch n.
Any of the arches formed from the costal processes or elements that give rise to the ribs in the thoracic region of the embryonic vertebral column.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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