1. A substance from which another substance is formed (especially by a metabolic reaction) 
2. A person who goes before or announces the coming of another
   - forerunner 
3. Something that precedes and indicates the approach of something or someone
   - harbinger, forerunner, predecessor, herald

Derived forms: precursors

Type of: indicant, indication, individual, material, mortal, person, somebody, someone, soul, stuff

Encyclopedia: Precursor

• cycle path
• cycle per second
• cycle rickshaw
• cycler
• cycles per second
• cycles/second
• cycleway
• cyclic
• cyclic disorder
• cyclic neutropenia
• cyclic redundancy check
• cyclical
• cyclically
• cyclicity
• cycling
• Cycliophora
• cyclist
• cyclo-
• cyclobenzaprine
• cyclodestructive surgery
• cyclohexanol
• cyclohexanol phthalate
• cycloid
• cycloidal
• Cycloloma