cauliflower - compact head of white undeveloped flowers

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

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

Brassica oleracea botrytis, cauliflower - a plant having a large edible head of crowded white flower buds