DICT.TW Dictionary Taiwan
3.147.82.22
Search for:
▼[Show options]
[Pronunciation] [Help] [Database Info] [Server Info]

1 definition found

From: WordNet (r) 2.0

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