The DICT Development Group

  Corn \Corn\ (k[^o]rn), n. [L. cornu horn: cf. F. corne horn,
     hornlike excrescence. See Horn.]
     A thickening of the epidermis at some point, esp. on the
     toes, by friction or pressure. It is usually painful and
     troublesome.
     [1913 Webster]
  
           Welcome, gentlemen! Ladies that have their toes
           Unplagued with corns, will have a bout with you.
                                                    --Shak.
     [1913 Webster]
  
     Note: The substance of a corn usually resembles horn, but
           where moisture is present, as between the toes, it is
           white and sodden, and is called a soft corn.
           [1913 Webster]

  soft corn
      n 1: corn having kernels almost entirely of soft starch [syn:
           soft corn, flour corn, squaw corn, Zea mays
           amylacea]