rotula /rotˈū-lə/

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

• piece goods
• pieceless
• piecemeal
• piecemealed
• piecemealing
• piecemeals
• piecen
• piecened
• piecener
• pieceners
• piecening
• piecens
• piece of eight
• piece of goods
• piece of one's mind
• piece of work
• piece out
• piecer
• piece rate
• piece rates
• piecers
• pieces
• piece together
• piece up
• piecework