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per os

per os in Medicine

per os (pər ŏs)
By way of the mouth, as in the administration of medication.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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  • By God's face, per os Dei, I will not eat bread till that fabric be torn in pieces.

    Past and Present Thomas Carlyle

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