rotula /rotˈū-lə/

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

• grubber
• grubbers
• grubbier
• grubbiest
• grubbily
• grubbiness
• grubbing
• grubble
• grubby
• grubhunter
• grub kick
• grub kicks
• grubs
• grub screw
• grub screws
• grub shop
• grub shops
• grubstake
• grubstaked
• grubstakes
• grubstaking
• Grub Street
• Grubstreet
• grudge
• grudge a thought