corncorn /kɔrn/ ●●● noun [uncountable] 
1
a tall plant with yellow seeds that are cooked and eaten as a vegetable: 
an ear of corn (=the top part of a corn plant on which these yellow seeds grow) steak and corn on the cob (=an ear of corn that is cooked and eaten)2medicine a thick, hard, and painful area of skin on your foot [Origin: Old English]
1 a tall plant with yellow seeds that are cooked and eaten as a vegetable: an ear of corn (=the top part of a corn plant on which these yellow seeds grow) steak and corn on the cob (=an ear of corn that is cooked and eaten)2medicine a thick, hard, and painful area of skin on your foot [Origin: Old English]
