PRN

p.r.n.

(in prescriptions) as the occasion arises; as needed.
Origin:
< Latin prō rē nāta

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Collins
World English Dictionary
prn
 
—abbreviation for
pro re nata
 
[Latin: as the situation demands; whenever needed]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Prn is always a great word to know.
So is slumgullion. Does it mean:
a stew of meat, vegetables, potatoes, etc.
a fool or simpleton; ninny.
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American Heritage
Medical Dictionary

p.r.n. or PRN
abbr.
Latin pro re nata (as the situation demands)

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Abbreviations & Acronyms
PRN
printer
p.r.n.
Latin pro re nata (as the situation demands)
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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