rotula /rotˈū-lə/

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

• tidiest
• tidily
• tidiness
• tidinesses
• tiding
• tidings
• tidivate
• tidivated
• tidivates
• tidivating
• tidivation
• tidivations
• tids
• tidy
• tidying
• tie
• tie-and-dye
• tieback
• tiebacks
• tie beam
• tie beams
• tormentings
• tormentor
• tormentors
• torments