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p.r.n.

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abbreviation
(in prescriptions) as the occasion arises; as needed.
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Origin of p.r.n.

From Latin prō rē nāta
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

British Dictionary definitions for p.r.n.

prn

abbreviation for (in prescriptions)
pro re nata

Word Origin for prn

Latin: as the situation demands; whenever needed
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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