Source : Webster's Revised Unabridged Dictionary (1913)

Silversides \Sil"ver*sides`\, n. (Zo["o]l.)
   Any one of several species of small fishes of the family
   {Atherinid[ae]}, having a silvery stripe along each side of
   the body. The common species of the American coast ({Menidia
   notata}) is very abundant. Called also {silverside}, {sand
   smelt}, {friar}, {tailor}, and {tinker}.

   {Brook silversides} (Zo["o]l.), a small fresh-water North
      American fish ({Labadesthes sicculus}) related to the
      marine silversides.

Source : WordNet®

silversides
     n 1: small fishes having a silver stripe along each side; found
          along the Atlantic coast of the United States [syn: {silverside}]
     2: the common North American shiner [syn: {common shiner}, {Notropis
        cornutus}]