The Collaborative International Dictionary
Postcommunion
Postcommunion \Post`com*mun"ion\, n. [Pref. post- + communion.]
(Ch. of Eng. & Prot. Epis. Ch.) The concluding portion of the communion service.
(R. C. Ch.) A prayer or prayers which the priest says at Mass, after the ablutions.
Wiktionary
postcommunion
n. 1 The concluding portion of the communion service. 2 (context Roman Catholicism English) A prayer or prayers which the priest says at Mass, after the ablutions.
Wikipedia
Postcommunion
Postcommunion ( Latin: Postcommunio) is the text said or sung on a reciting tone following the Communion of the Mass.