- a.d.
- a.d.
► Abbreviation in general use, chiefly Ecclesiasticalante diem ("The day before")The Catholic Encyclopedia, Volume VIII. — New York: Robert Appleton Company. Nihil Obstat. 1910.
Catholic encyclopedia.
The Catholic Encyclopedia, Volume VIII. — New York: Robert Appleton Company. Nihil Obstat. 1910.
Catholic encyclopedia.