precursor

2 ENTRIES FOUND:

pre·cur·sor

noun \pri-ˈkər-sər, ˈprē-ˌ\

Definition of PRECURSOR

1
: one that precedes and indicates the onset of another <angina may be the precursor of a second infarction>
2
: a substance, cell, or cellular component from which another substance, cell, or cellular component is formed especially by natural processes

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