\Da*ta"ri*a\, n. [LL., fr. L. datum given.] (R. C. Ch.)
Formerly, a part of the Roman chancery; now, a separate
office from which are sent graces or favors, cognizable in
foro externo, such as appointments to benefices. The name is
derived from the word datum, given or dated (with the
indications of the time and place of granting the gift or
favor).