silphium /silˈfi-əm/

1. A plant (perh the umbelliferous Ferula tingitana) imported from Cyrenaica by the Greeks for use as a food and in medicine (historical)
2. (cap) a genus of American composites, compass plants

• clay eater
• clay eaters
• clayed
• clayey
• clay-ground
• clay-grounds
• clayier
• clayiest
• claying
• clay-ironstone
• clay-ironstones
• clayish
• clay-marl
• claymation
• claymations
• clay-mill
• clay-mills
• clay mineral
• claymore
• claymore mine
• claymore mines
• claymores
• claypan
• claypans
• clay pigeon