n.plLogialog′i-a oracles, sayings, a supposed primitive collection of the sayings and discourses of Jesus, largely drawn upon by the writers of the first and third gospels for much of what they have in common with each other apart from Mark.
Chambers's Twentieth Century Dictionary
This second common source for Matthew and Luke has been called Logia because it is chiefly discourses.
"A Harmony of the Gospels for Students of the Life of Christ" by Archibald Thomas Robertson
Mandalay Digital Group Inc announced late Tuesday that it signed an agreement to acquire assets of Logia Group, a mobile content development provider.