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)

precurˈsive or precurˈsory adjective

• trogging
• troggs
• troglodyte
• troglodytes
• Troglodytes
• troglodytic
• troglodytical
• troglodytism
• troglodytisms
• trogon
• Trogonidae
• trogons
• trogs
• Troic
• troika
• troikas
• troilism
• troilisms
• troilist
• troilists
• troilite
• troilites
• troisième âge
• Trojan
• Trojan horse