rotula /rotˈū-lə/

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

• agonistics
• agonists
• agonize
• agonized
• agonizedly
• agonizes
• agonizing
• agonizingly
• agonothetes
• agons
• agony
• agony aunt
• agony aunts
• agony column
• agony columns
• agony uncle
• agony uncles
• agood
• a good bet
• a good buy
• a good few
• a good innings
• a good job
• a good run for one's money
• a good sort