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Noun: precursor  pri'kur-su(r) or 'pree,kur-su(r)
  1. (biochemistry) 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