agrapha
plural noun
ag·ra·pha ˈa-grə-fə 
: sayings of Jesus not in the canonical gospels but found in other New Testament or early Christian writings
Word History
Etymology
borrowed from New Latin, borrowed from Late Greek ágrapha "uncanonical scriptures," going back to Greek, "unwritten laws," from neuter plural of ágraphos "unwritten," from a- a- entry 2 + -graphos, derivative of gráphein "to write" — more at carve
First Known Use
1890, in the meaning defined above