Cetus can refer to:
- The constellation Cetus
- The former biotechnology company Cetus Corporation
- Project Cetus, crewless submarine being developed by the United Kingdom
- Cetus (mythology), the monster sent to devour Andromeda which was slain by Perseus
- "-cetus", a suffix used to describe whales in taxonomy.
- Cetus, a settlement on Earth in the online game Warframe that hosts the Ostrons, a civilization of human traders
This disambiguation page lists articles associated with the title Cetus.
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