Source : Webster's Revised Unabridged Dictionary (1913)

Flamen \Fla"men\, n.; pl. E. {Flammens}, L. {Flamines}. [L.]
   (Rom. Antiq.)
   A priest devoted to the service of a particular god, from
   whom he received a distinguishing epithet. The most honored
   were those of Jupiter, Mars, and Quirinus, called
   respectively Flamen Dialis, Flamen Martialis, and Flamen
   Quirinalis.

         Affrights the flamens at their service quaint.
                                                  --Milton.

Source : WordNet®

flamen
     n : a priest who served a particular deity in ancient Rome
     [also: {flamines} (pl)]