Precursor Meaning. A precursor is a biochemical substance such as an intermediate compound in a chain of enzymatic reactions that gives rise to a more stable or definitive product. However in the field of soot precursor is used for the monomers like PAHs aromers that nucleate towards.

A substance cell or cellular component from which another substance cell or. The pre-meal selection of chutneys is a precursor of the sharp flavours to come. In mass spectrometry the ion that dissociates to a smaller fragment ion usually due to collision-induced dissociation in an multistagemass spectrometry MSMS experiment.
After watching my nephew for a while I can easily recognize his moodiness as a precursor to naptime.
A movie preview is a standard precursor before the presentation of a feature film. A substance cell or cellular component from which another substance cell or. One that precedes and indicates the approach of another. A precursor of something is a similar thing that happened or existed before it often.