Rē'gĭ-āns or Rē'gĭ-ās, a.

a. [Lat. regius, -a, -um, royal, fr. rex, regis, a king.] Of, or pertaining to, a king; royal.

Regium donum, the royal gift; a sum of money granted yearly by the English crown in aid of the Presbyterian clergy of Ireland. Brande.—Regius professor (Eng. Universities), an incumbent of a professorship founded by royal bounty.