Brussels sprout

noun
1.
Usually, Brussels sprouts. a plant, Brassica oleracea gemmifera, having small, cabbagelike heads or buds along the stalk, eaten as a vegetable.
2.
Brussels sprouts, any of the heads or buds, eaten as a vegetable.
Origin
1790-1800
British Dictionary definitions for Brussels sprout

Brussels sprout

noun
1.
a variety of cabbage, Brassica oleracea gemmifera, having a stout stem studded with budlike heads of tightly folded leaves, resembling tiny cabbages
2.
the head of this plant, eaten as a vegetable