lituus
/ˈlɪtju.əs/
noun 3
Definitions
noun
1
A military trumpet.
1786: Fig. 3. A Roman Lituus, or military trumpet, such as is mentioned by Horace in his first ode. — Francis Grose, A Treatise on Ancient Armour and Weapons, page vi.
2
An augur's staff with a recurved top.
3
A curve with polar equation r²θ=a², where a is a constant.
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