Courser /(k?rs"?r)/

Cours·er

Courser

n.
  1. One who courses or hunts.
    leash is a leathern thong by which . . . a courser leads his greyhound.
    — Hanmer.
  2. A swift or spirited horse; a racer or a war horse; a charger. [Poetic.]
  3. A grallatorial bird of Europe (Cursorius cursor), remarkable for its speed in running. Sometimes, in a wider sense, applied to running birds of the Ostrich family. (Zool.)