Orcus (disambiguation) explained

Orcus was a Roman god of the underworld.

Orcus may also refer to:

• Orcus (dwarf planet), a trans-Neptunian dwarf planet
• Orcus (beetle), a genus of beetles in the family Coccinellidae
• Orcus Patera, a large elongated depression the planet Mars
• Orcus (Dungeons & Dragons), a demon prince in the Dungeons & Dragons role-playing game
• Orcus, a major villain in the science fiction/fantasy Empire of the East series by Fred Saberhagen