rotula /rotˈū-lə/

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

• swingiest
• swinging
• swinging-block
• swinging-boom
• swinging-booms
• swingingly
• swinging-post
• swinging-posts
• swingings
• swingism
• swingisms
• swingle
• swingle-bar
• swingle-bars
• swingled
• swingle-hand
• swingle-hands
• swingles
• swingletree
• swingletrees
• swingling
• swinglings
• swingling-stock
• swingling-stocks
• swing-music