1. The quality of being infectious

Derived forms: infectiousnesses

• long-windedly
• long-windedness
• long-wooled
• longan
• longanberry
• longanimity
• longanimous
• longar palm
• longbeard
• longboat
• longbow
• longbowman
• longcase clock
• longe
• longed-for
• longer
• longest
• longevity
• Longfellow
• longfin mako
• longhair
• longhand
• longheaded thimbleweed
• longhorn
• longicorn