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)

• clysters
• cm
• CM
• Cm
• Cmd
• Cmdr.
• CMG
• CMH
• CMHR
• CMI
• CML
• Cmnd
• CMOS
• CMS
• CMV
• c/n
• cn
• CN
• Cn
• CNAA
• CnaG
• CNAR
• CND
• cnemial
• Cnicus