Echinus may refer to:
- Echinus (Acarnania), a town in ancient Acarnania, Greece
- Echinus (Thessaly), a town in ancient Thessaly, Greece; also a Roman Catholic titular bishopric
- Echinus (molding), a molding similar to the ovolo
- Echinus (sea urchin), a genus of animals
- Echinus (plant), a synonym for the plant genus Mallotus
This disambiguation page lists articles associated with the title Echinus.
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