From Longman Dictionary of Contemporary Englishcauliflowercau‧li‧flow‧er /ˈkɒlɪˌflaʊə $ ˈkɒːliˌflaʊər, ˈkɑː-/ noun [countable, uncountable] 
DFFHBPa vegetable with green leaves around a firm white centre
DFFHBPa vegetable with green leaves around a firm white centreExamples from the Corpus
cauliflower• Then, for entrance or a parade, you have them carry a melon and a cauliflower to make Melancholy.• Serve with new potatoes, broccoli and cauliflower.• All during supper, eating a pork chop and cauliflower and mashed potatoes, Stephen had wanted to be alone.• A vegetarian, he goes for days consuming nothing but fruit juices and cauliflower.• This amuses us, since people are glad to eat such flowers as cauliflower, broccoli, and artichokes.• Like a giant cauliflower, interjects Blue.• Turn out the lights, they hear rustling noises downstairs: a gang of cauliflower trying the back door.• Look for new season's cauliflowers.Origin cauliflower (1500-1600) Italian cavolfiore, from cavolo “cabbage” + fiore “flower” 