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)

• zealful
• zealless
• zealot
• zealotism
• zealotisms
• zealotries
• zealotry
• zealots
• zealous
• zealously
• zealousness
• zealousnesses
• zeals
• Zeas
• zeatin
• zeatins
• zebec
• zebeck
• zebra
• zebra crossing
• zebra crossings
• zebra finch
• zebra finches
• zebra parakeet
• zebra parakeets