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)

• threepeat
• threepeated
• threepeating
• threepeats
• threepence
• threepences
• threepenceworth
• threepennies
• threepennorth
• threepenny
• threepenny bit
• threepenny piece
• threepennyworth
• three-per-cents
• three-phase
• three-piece
• three-pieces
• three-pile
• three-piled
• three-piles
• threeping
• threepit
• three-plies
• three-ply
• three-point landing