first vatican council first trimester • first viscount haldane of cloan · · · Info · Definitions · Characters · · first vatican council · · Text Common · · Latin · · Scripts 21 · · Length 6 · · Syllables Definitions · · · (noun) the Vatican Council in 1869-1870 that proclaimed the infallibility of the pope when speaking ex cathedra. Synonyms: First Vatican Council, Vatican I. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 f latin small letter f U+0066 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075 v latin small letter v U+0076