rouleau UK /ɹuːˈləʊ/US /ɹuˈloʊ/ noun4 •A little roll; a roll of coins put up in paper, or something resembling such a roll.We always judge of others by ourselves; and his idea of Cupid's quiver is a rouleau. — 1837 •[in the plural] A stack of aggregated red blood cells, as seen in certain haematological and other diseases. •A decorative technique that involves creating patterns with piping, cording or bias tape. A rouleau loop uses the same cord or piping as a way of fastening buttons, most notably down the back of bridal gowns. •One of a bundle of fascines to cover besiegers. formsrouleaus · rouleaux