an ear of corn (=the top part of the plant where the yellow seeds grow)
►corn on the cob
Do you want corn on the cob (=the seeds cooked while still on the cob) or green beans?
1 [uncountable]a)a tall plant with large yellow seeds that grow together on a cob (=long hard part). The seeds are cooked and eaten as a vegetable or fed to animals: an ear of corn (=the top part of the plant where the yellow seeds grow)b)the seeds of this plant: The chickens are fed corn. Do you want corn on the cob (=the seeds cooked while still on the cob) or green beans? → see alsoIndian corn2[countable]medicine a painful area of thick hard skin on your foot3[uncountable] informal things such as songs, jokes, movies, etc. which are old-fashioned, sentimental, or silly → corny [Origin: (1, 2) Old English]