torus

to·rus

noun \ˈtōr-əs, ˈtȯr-\

plural to·ri \ˈtō(ə)r-ˌī, ˈtȯ(ə)r-, -ˌē\

Definition of TORUS

1

: a doughnut-shaped surface generated by a circle rotated about an axis in its plane that does not intersect the circle

2

: a smooth rounded anatomical protuberance (as a bony ridge on the skull) <a supraorbital torus>