rotula /rotˈū-lə/

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

• nickel
• nickel-and-dime
• nickelback
• nickel-bloom
• nickeled
• nickelic
• nickeliferous
• nickeline
• nickelines
• nickeling
• nickelise
• nickelised
• nickelises
• nickelising
• nickelize
• nickelized
• nickelizes
• nickelizing
• nickelled
• nickelling
• nickel-ochre
• nickelodeon
• nickelodeons
• nickelous
• nickel-plating