queen regent(n = noun.person) - a queen who serves as ruler when the king cannot;
is a kind of queen
beauty queen, closet queen, hangar queen, mary queen of scots, may queen, queen, queen anne's lace, queen bee, queen charlotte sound, queen city, queen consort, queen dowager, queen isabella, queen it over, queen maud land, queen mole rat, queen mother, queen of england, queen of the may, queen of the night, queen olive, queen post, queen regnant, queen triggerfish, queen truss, queen victoria, regent, regent diamond