Ecclesiastical Glossary

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Each page contains all the entries for a single letter of the alphabet. Use the page controls at the bottom of each page to navigate: 1=A, 2=B, 3=C, 4=D, etc.


ICHTHUS  Greek word for ‘fish’, ICHTHUS is an acronym from the first letters of the Greek words “Jesus Christ, God’s Son, Savior.”

IC XC Mongram of Jesus Christ (from the Greek).

IHS Latin monogram of Jesus’ name, commonly believed to mean Iesus Hominum Salvator, ‘Jesus Savior of Men’. (In Roman Catholic tradition this monogram is also associated with icons of St. Bernardine of Siena, St. John Capistran, St. Vincent Ferrer, and the Jesuit Order.) Sometimes also written as “IHC” or “JHS.”

image of God To be made without sin, perfectly knowing and gladly doing God’s will; Jesus came to earth as a man in the image of God and remained without sin

Immanuel A name of Jesus meaning “God with Us.”

incense Fragrant smoke used in conjunction with worship; our prayers rise to God like the rising smoke.

I N R I Latin monogram Iesus Nazarenus Rex Iudeorum, ‘Jesus of Nazareth, King of the Jews’. This monogram captures the posted charge against Jesus placed on the top of Jesus’ cross. See Matthew 27:37, Mark 15:26, Luke 23:38 and John 19:19.

instituted Put into place for a specific purpose.

Introit Latin intoritus, ‘enter in’. The opening sentences sung or spoken at the beginning of the Divine Service, usually comprised of antiphon verses, the Psalm verse, and the Gloria Patri.

Invitatory Latin invitatorium ‘invitation’. The antiphon in Matins which invites the congregation to worship; part of the Invitatory Psalm which then follows.

Invocation Latin invocare, ‘call upon’ .he words “In the name of the Father and of the Son and of the Holy Spirit” spoken at the beginning of the service; serves as a reminder of Holy Baptism.

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