taste starts = T, unpleasantly sour = ORUS torus: a large convex moulding approximately semicircular in cross section, esp one used on the base of a classical column http://www.thefreedictionary.com/torus
torus: a large convex moulding approximately semicircular in cross section, esp one used on the base of a classical column http://www.thefreedictionary.com/torus