Definify.com
Webster 1913 Edition
Lituus
‖
Lit′u-us
,Noun.
pl.
Litui
(#)
. [L.]
1.
(Rom. Antig.)
(a)
A curved staff used by the augurs in quartering the heavens.
(b)
An instrument of martial music; a kind of trumpet of a somewhat curved form and shrill note.
2.
(Math.)
A spiral whose polar equation is
r
; that is, a curve the square of whose radius vector varies inversely as the angle which the radius vector makes with a given line. 2
θ = a