n. (pl. tori) 1 Archit. a large convex bun-shaped moulding esp. as the lowest part of the base of a column. 2 Bot. the receptacle of a flower. 3 Anat. a smooth ridge of bone or muscle. 4 Geom. a surface or solid formed by rotating a closed curve, esp. a circle, about a line in its plane but not intersecting it.
[ L, = swelling, bulge, cushion, etc. ]