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

• biparous
• bipartisan
• bipartisanship
• bipartite
• bipartition
• bipartitions
• biped
• bipedal
• bipedalism
• bipedalisms
• bipeds
• bipetalous
• biphasic
• biphenyl
• biphenyls
• bipinnaria
• bipinnarias
• bipinnate
• biplane
• biplanes
• BIPM
• bipod
• bipods
• bipolar
• bipolar disorder