precursor /prē-kûrˈsər/

1. Something that exists or goes in advance of another
2. An indication of the approach of an event
3. A forerunner, herald or harbinger
4. A predecessor
5. A substance from which the one in question is derived or manufactured (chem)

• broad arrow
• broad arrows
• broadband
• broad-based
• broad bean
• broad beans
• broadbill
• broadbills
• broad-brim
• broad-brims
• broadbrush
• broadcast
• broadcasted
• broadcaster
• broadcasters
• Broadcasters' Audience Research Board
• broadcasting
• broadcastings
• broadcasts
• broadcast videotex
• broad-church
• Broad Church
• broadcloth
• broadcloths
• broad day