____ Domini (4)

I believe the answer is:

anno

(Other definitions for anno that I've seen before include "...Domini, year of Our Lord" , "... Domini, after the birth of Christ" , "...Domini, AD" , "Year (L.)" .)

I've seen this clue in the Penny Press, The New York Times, the Universal, the LA Times, The Wall Street Journal and the King Feature Syndicate.

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