- Geometry. a polar curve generated by the locus of a point moving so that the square of its radius vector varies inversely as the angle the radius vector makes with the polar axis. Equation: θr2 = a.
- (in ancient Rome) a crook-shaped staff used by augurs for divination.
Origin of lituus
1605–15; < Latin; geometrical sense from the curve's resemblance to such a staff
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for lituus
A Roman lituus, or clarion, was found near Tattershall Ferry.Records of Woodhall Spa and Neighbourhood
J. Conway Walter
Lituus, li-tū′us, n. an augur's staff with recurved top: a spiral of similar form.
The Roman lituus, the chief ensign of the augurs, became the crozier.History of the Conflict Between Religion and Science
John William Draper
Eckhel infers from the guttus and lituus on one of Sulla's coins that he was an Augur.Plutarch's Lives, Volume II
Aubrey Stewart & George Long