Source : Webster's Revised Unabridged Dictionary (1913)

Romanist \Ro"man*ist\, n.
   One who adheres to Romanism.

Source : WordNet®

Romanist
     adj : of or relating to or supporting Romanism; "the Roman
           Catholic Church" [syn: {Roman}, {r.c.}, {romish}, {Roman
           Catholic}, {popish}, {papist}, {papistic}, {papistical}]