pro re nata

Adverb

Synonyms: as needed as required pro re nata PRN

WordNet 3.0

Adverb (1)

according to need (physicians use PRN in writing prescriptions)“add water as needed”Synonyms: as needed as required pro re nata PRN

Webster's Dictionary (GCIDE)

Pro \Pro\, prep. [L.; akin to prae before, Gr. ?, and E. for. See For, prep., and cf. Prior, a.] A Latin preposition signifying for, before, forth. [1913 Webster]

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. [1913 Webster]