Definitions
1.NounThe curve traced by a point on a circle as it rolls along a straight line
2.NounAn organism or fossil with a trochoid shell (especially one in the gastropod family Trochidae), or the shell itself.
3.AdjectiveCapable of rolling.
4.AdjectiveAllowing rotation.
5.AdjectiveHigh-spired; conical. Bartsch's star bolma has a trochoid shell.