envelope

envelope definition - medical

en·ve·lope (ĕnˈvə-lōpˌ, ŏnˈ-)

noun
An enclosing structure or cover, such as a membrane or the outer coat of a virus.

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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Pushing the Envelope439 years ago

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