Definition of quartodeciman in English English dictionary
Any of a group of early Christians who began Easter on Nisan 14, the day Jesus was crucified according to the Gospel of JohnJohn 19: 14, 31, 42, and the day before the beginning of Jewish Passover, which is Nisan 15
() From the Biblical Latin quarta decima"." (HTML) Leviticus 23:5: "Mense primo, quarta decima die mensis, ad vesperum Pascha Domini est." for the fourteenth day of the first month of the Jewish calendar, which is Nisan