[ 'tɔ:rəs ]
■ noun ( plural tori -rʌɪ or ~es )
1》 Geometry a surface or solid resembling a ring doughnut, formed by rotating a closed curve about a line which lies in the same plane but does not intersect it.
2》 a ring-shaped object or chamber.
3》 Architecture a large convex moulding, semicircular in cross section, especially as the lowest part of the base of a column.
4》 Anatomy a ridge of bone or muscle.
5》 Botany the receptacle of a flower.
Origin
C16: from L., lit. 'swelling, round moulding'.