lituus /litˈū-əs/

1. An augur's curved staff (historical)
2. A J-shaped Roman trumpet (historical)
3. A curve of similar form with the polar equation r² θ = a (mathematics)

• spirochaete
• spirochaetes
• spirochaetoses
• spirochaetosis
• spirogram
• spirograms
• spirograph
• spirographies
• spirographs
• spirography
• spirogyra
• spirogyras
• spiroid
• spirometer
• spirometers
• spirometric
• spirometries
• spirometry
• spironolactone
• spironolactones
• spirophore
• spirophores
• spirt
• spirted
• spirting