trochoid

About 0.02 uses per million words.

Meaning

1. noun The curve traced by a point on a circle as it rolls along a straight line
2. noun An organism or fossil with a trochoid shell (especially one in the gastropod family Trochidae), or the shell itself.
3. adjective Capable of rolling.
4. adjective Allowing rotation.
5. adjective High-spired; conical. Bartsch's star bolma has a trochoid shell.

Similar words

hypotrochoid strophoid epitrochoid cycloid rotoid osculating circle hypocycloid circloid cyclogon brachistochrone

Often followed by

is joint and spiral or at of with form

Word family

trochoidal trochoids