Source : Webster's Revised Unabridged Dictionary (1913)

Sea cock \Sea" cock`\
   1. In a steamship, a cock or valve close to the vessel's
      side, for closing a pipe which communicates with the sea.

   2. (Zo["o]l.)
      (a) The black-bellied plover.
      (b) A gurnard, as the European red gurnard ({Trigla
          pini}).