torus

torus definitions

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

• A rounded ridge of bone or muscle, especially one on the occipital bone. 

• {{lb|en|topology|in combination|n-torus|4-torus|etc.}} The product of the specified number of circles. 

• A topological space which is a product of two circles. 

• A large convex molding, typically semicircular in cross section, which commonly projects at the base of a column and above the plinth. 

• The end of the peduncle or flower stalk to which the floral parts (or in the Asteraceae, the florets of a flower head) are attached. 

• A ring-shaped object, especially a large ring-shaped chamber used in physical research.