Source : Webster's Revised Unabridged Dictionary (1913)

Sea corn \Sea" corn`\ (Zo["o]l.)
   A yellow cylindrical mass of egg capsule of certain species
   of whelks ({Buccinum}), which resembles an ear of maize.

Buccinum \Buc"ci*num\, n. [L., a trumpet, a trumpet shell.]
   (Zo["o]l.)
   A genus of large univalve mollusks abundant in the arctic
   seas. It includes the common whelk ({B. undatum}).