DICT.TW Dictionary Taiwan

 pro re na·ta /ˌproˌreˈnɑtɑ/

 Pro, prep.  A Latin preposition signifying for, before, forth.
 Pro confesso [L.] Law, taken as confessed. The action of a court of equity on that portion of the pleading in a particular case which the pleading on the other side does not deny.
 Pro rata. [L. See Prorate.] In proportion; proportion.
 Pro re nata [L.] Law, for the existing occasion; as matters are.

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