torus

play
noun to·rus \ˈtȯr-əs\

Definition of torus

plural

tori

play \ˈtȯr-ˌī, -ˌē\
  1. 1 :  a large molding of convex profile commonly occurring as the lowest molding in the base of a column

  2. 2 :  the thickening of a membrane closing a wood-cell pit (as of gymnosperm tracheids) having the secondary cell wall arched over the pit cavity

  3. 3 :  a doughnut-shaped surface generated by a circle rotated about an axis in its plane that does not intersect the circle; broadly :  toroid

  4. 4 :  a smooth rounded anatomical protuberance (such as a bony ridge on the skull)

Origin and Etymology of torus

New Latin, from Latin, protuberance, bulge, torus molding


First Known Use: 1563


Medical Dictionary

torus

play
noun to·rus \ˈtōr-əs, ˈtȯr-\

Medical Definition of torus

plural

tori

\ˈtō(ə)r-ˌī, ˈtȯ(ə)r-, -ˌē\play play
  1. 1:  a doughnut-shaped surface generated by a circle rotated about an axis in its plane that does not intersect the circle

  2. 2:  a smooth rounded anatomical protuberance (as a bony ridge on the skull) a supraorbital torus

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