A wheel with a toothed rim, intended to engage with others, or similar equipment, to form a gear.
A device incorporating spinning, wind-driven propellers or pinwheels, used as whimsical outdoor decoration in a garden or on a porch.
A whirligig beetle.
Anything that whirls or spins around, such as a toy top or a merry-go-round.
A device for punishing prisoners, comprising a wooden cage that rapidly spins around to induce nausea.