SG Heritage Dictionary

Lituus [Noun] Webster's Dictionary 1913

1. A curved staff used by the augurs in quartering the heavens.

2. An instrument of martial music; a kind of trumpet of a somewhat curved form and shrill note.

3. 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.