precursor
1. [ noun ] a person who goes before or announces the coming of another
Synonyms: forerunner
Related terms: person predecessor
2. [ noun ] a substance from which another substance is formed (especially by a metabolic reaction)
Related terms: substance biochemistry
3. [ noun ] an indication of the approach of something or someone
Synonyms: forerunner herald harbinger
Related terms: indication announce
Similar spelling:   precursory
  procurator
  procure
  procurer
  procural
  procuress
  Precourt
  Pricer
  procurance
  procurable
  Procrustes
  procaryote
  precarious
  procurement
  procaryotic
  pricker