p.r.n.

(in prescriptions) as the occasion arises; as needed.

Nearby words

p.p.f., p.p.s., p.q., p.r., p.r.e., p.r.n., p.s., p.ss., p.t., p.t.o., p.u.d.

Origin of p.r.n.

From the Latin word prō rē nāta

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for prn

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

Medicine definitions for prn

p.r.n.

abbr.

pro re nata (as the situation demands)