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plural rouleaus or rouleaux
A little roll; a roll of coins put up in paper, or something resembling such a roll. quotations examples
We always judge of others by ourselves; and his idea of Cupid's quiver is a rouleau.
1837, L[etitia] E[lizabeth] L[andon], “Lady Marchmont to Sir Jasper Meredith. Courtiers.”, in Ethel Churchill: Or, The Two Brides. […], volume I, London: Henry Colburn, […], page 260
Early in the morning, the rouleau of gold was left at my door in a little box, with my name on the outside.
1859, Charles Dickens, A Tale of Two Cities
[…] he liked your philosophy, and hopes you'll accept of this, which from its weight I take to be a little rouleau of guineas.
1863, Sheridan Le Fanu, The House by the Churchyard
(textiles) 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. examples
(medicine, chiefly in the plural) A stack of aggregated red blood cells, as seen in certain haematological and other diseases. examples
(fortification) One of a bundle of fascines to cover besiegers. examples