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)

• dogtowns
• dog-trick
• dog-tricks
• dogtrot
• dogtrots
• dogvane
• dogvanes
• dog violet
• dog violets
• dogwatch
• dogwatches
• dog-weary
• dog-wheat
• dog-whelk
• dog-whelks
• dog whistle
• dog-winkle
• dogwood
• dogwoods
• dogy
• d'oh
• doh
• DoH
• dohs
• dohyo