Rounceval \Roun"ce*val\, a. [F. Ronceval, Roncevaux, a town at the foot of the foot of the Pyrenees, Sp. Roncesvalles.] Large; strong; -- from the gigantic bones shown at Roncesvalles, and alleged to be those of old heroes. [Obs.] Rounceval \Roun"ce*val\, n. A giant; anything large; a kind of pea called also {marrowfat}. [Obs.]