capital of old Brabant and modern Belgium, a name of Germanic origin, from brocca "marsh" + sali "room, building," from Latin cella (see cell). It arose 6c. as a fortress on an island in a river. As a type of carpet, from 1799; as a type of lace, from 1748. Brussels sprouts (Brassica oleracea gemmifera) attested from 1748 (the first written description of them is from 1580s).