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)

• peraeopod
• perai
• perais
• perambulate
• perambulated
• perambulates
• perambulating
• perambulation
• perambulations
• perambulator
• perambulators
• perambulatory
• per an.
• per annum
• per ardua ad astra
• perborate
• perborates
• Perca
• percale
• percales
• percaline
• percalines
• per capita
• per caput
• percase