rouleau

noun

1. 1.A little roll; a roll of coins put up in paper, or something resembling such a roll.
2. 2.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.
3. 3.(chiefly in the plural) A stack of aggregated red blood cells, as seen in certain haematological and other diseases.
4. 4.(fortification) One of a bundle of fascines to cover besiegers.