- brussels sprout, Brassica oleracea gemmifera - plant grown for its stout stalks of edible small green heads resembling diminutive cabbages
--1 is a kind of crucifer, cruciferous plant
--1 has parts: brussels sprout, brussels sprouts - brussels sprout, brussels sprouts - small cabbage-like heads or buds growing along a stalk
--2 is a kind of cruciferous vegetable
--2 is a part of brussels sprout, Brassica oleracea gemmifera