rarefaction

rarefaction definition - medical

rar·e·fac·tion (rârˌə-făkˈshən)

noun
A decrease in density and pressure in a medium, such as air, caused by the passage of a sound wave.

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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