Introibo

== English == === Etymology === From Ecclesiastical Latin introībō ad altāre Deī (“I shall go in towards the altar of God”), the first line spoken. === Pronunciation === (Received Pronunciation) enPR: ĭnʹtrō-ēbō, IPA(key): /ˈɪntɹəʊiːbəʊ/ Hyphenation: In‧tro‧i‧bo === Noun === Introibo (plural not attested) (Roman Catholicism) The prayers spoken by the priest at the foot of the altar at the start of a Tridentine Mass.