Source : Webster's Revised Unabridged Dictionary (1913)

Light-horseman \Light"-horse`man\ (-h[^o]rs`man), n.; pl. {-men}
   (-men).
   1. A soldier who serves in the light horse. See under 5th
      {Light}.

   2. (Zo["o]l.) A West Indian fish of the genus {Ephippus},
      remarkable for its high dorsal fin and brilliant colors.