Mars

noun3

1. •
   the fourth planet from the sun, which looks red in the night sky

   • Mars has two moons, Deimos and Phobos.
2. •
   (rare) Gules (red), in the postmedieval practice of blazoning the tinctures of certain sovereigns' (especially British monarchs') coats as planets.
3. •
   (no longer used) Iron.

noun1

1. •
   Abbreviation of multicast address resolution server.