senega /senˈi-gə/

1. An American milkwort, Polygala senega
2. Its dried root used as an expectorant and reputed by the Seneca Native Americans to be an antidote for snake-bites (also senega snakeroot)

• three-cleft
• three-colour
• three-colour process
• three-cornered
• three-D
• three-day event
• three-day eventer
• three-deck
• three-decker
• three-deckers
• three deep
• three-dimensional
• three-dimensionality
• three estates
• three-farthing
• three-farthings
• threefold
• threefoldness
• threefoldnesses
• three-foot
• three-four
• three-four time
• three-halfpence
• three-halfpenny
• three-halfpennyworth