quatrefoil /katˈər-foil or katˈrə-foil/ or quatrefeuille /-fœ-ē or -fīl/

1. A four-petalled flower or leaf of four leaflets
2. An openwork design or ornament divided by cusps into four lobes (architecture)

• meteorology
• meteorous
• meteors
• meteor shower
• meteor showers
• meteor storm
• meteor storms
• meteor streams
• meteor swarm
• meteor swarms
• -meter
• meter
• metered
• metering
• meter maid
• meter maids
• meter man
• meters
• metes
• metestick
• metesticks
• metewand
• metewands
• meteyard
• meteyards