filioque /fɪliˈoʊkwiː/ noun1 •The use of the Latin word filioque (“and from the son”) in the Western form of the Nicene Creed, to indicate that the Holy Spirit proceeds from both the Father and the Son (as opposed to the Eastern Orthodox Churches which believe the Spirit proceeds from the Father alone).The Second Council of Lyon […] only succeeded in confirming and defining a key item of Catholic theology, the filioque, which has barred the way to reconciliation ever since. — 2011
