rotula /rotˈū-lə/

1. The knee-cap (anatomy)
2. A radial piece of Aristotle's lantern in sea-urchins (zoology)

• rotor planes
• rotors
• rotor ship
• rotor ships
• rotor-station
• rotor-stations
• rototiller
• rototillers
• rotovate
• rotovated
• rotovates
• rotovating
• Rotovator®
• rots
• rot-stone
• rottan
• rotted
• rotten
• rotten apple
• sizinesses
• sizing
• sizings
• sizism
• sizisms
• sizist