1. Very leafy malodorous tropical weedy shrub whose seeds have been used as an adulterant for coffee; sometimes classified in genus Cassia
   - coffee senna, mogdad coffee, styptic weed, stinking weed, Senna occidentalis

Type of: senna

• Nypa
• Nyquist frequency
• Nyquist rate
• NYSE
• Nyssa
• Nyssa aquatica
• Nyssa sylvatica
• Nyssaceae
• nystagmus
• Nystan
• nystatin
• Nyungar
• Nyx
• NZ
• NZD
• né
• née
• Néel
• o
• O level
• O ring
• O'Brien
• O'Casey
• o'clock
• O'Connor