chalasia

chalasia definition - medical

cha·la·sia (kə-lāˈzhə) or cha·la·sis (-lāˈsĭs)

noun
The inhibition and relaxation of a previously sustained contraction of a muscle or synergistic group of muscles, such as the cardiac sphincter.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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