A cycloid is a curve traced by a rolling circle. "Cycloid" can also refer to:

• Cyclida (formerly Cycloidea), an order of prehistoric crustaceans
• Cycloid scale, a type of scale seen on some fishes
• Cycloid-β and Cycloid-γ, characters in the Street Fighter games

This disambiguation page lists articles associated with the title Cycloid.
If an internal link led you here, you may wish to change the link to point directly to the intended article.