| Lituus 1. (n.) A curved staff used by the augurs in quartering the heavens. 2. (n.) An instrument of martial music; a kind of trumpet of a somewhat curved form and shrill note. 3. (n.) A spiral whose polar equation is r2/ = a; that is, a curve the square of whose radius vector varies inversely as the angle which the radius vector makes with a given line. Thesaurus Entries alpenhorn, alphorn, alto horn, ballad horn, baritone, bass horn, brass choir, brass wind, brass-wind instrument, brasses, bugle, bugle horn, clarion, cornet, cornet-a-pistons, corno di caccia, cornopean, double-bell euphonium, euphonium, helicon, horn, hunting horn, key trumpet, lituus, lur, mellophone, ophicleide, orchestral horn, pocket trumpet, post horn, sackbut, saxhorn, saxtuba, serpent, slide trombone, sliphorn, sousaphone, tenor tuba, tromba, trombone, trumpet, tuba, valve trombone, valve trumpet |