Search Result for "prn": 
Wordnet 3.0

ADVERB (1)

1. according to need (physicians use PRN in writing prescriptions);
- Example: "add water as needed"
[syn: as needed, as required, pro re nata, PRN]



WordNet (r) 3.0 (2006):

PRN
    adv 1: according to need (physicians use PRN in writing
           prescriptions); "add water as needed" [syn: as needed,
           as required, pro re nata, PRN]