broccoli - branched green undeveloped flower heads

crucifer, cruciferous plant - any of various plants of the family Cruciferae

Brassica, genus Brassica - mustards: cabbages; cauliflowers; turnips; etc.

cruciferous vegetable - a vegetable of the mustard family: especially mustard greens; various cabbages; broccoli; cauliflower; brussels sprouts

Brassica oleracea italica, broccoli - plant with dense clusters of tight green flower buds