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1. (n.) precursor
a person or thing that precedes, as in a job or a method; predecessor.
2. precursor
a person, animal, or thing regarded as a harbinger:
The first robin is a precursor of spring.
3. precursor
a chemical that is transformed into another compound, as in the course of a chemical reaction, and therefore precedes that compound in the synthetic pathway:
Cholesterol is a precursor of testosterone.
4. precursor
a cell or tissue that gives rise to a variant, specialized, or more mature form.
Etymology: (1375–1425; late ME < L)
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| Definition of 'precursor' |
Princeton's WordNet |
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1. (noun) precursor
a substance from which another substance is formed (especially by a metabolic reaction)
2. (noun) precursor, forerunner
a person who goes before or announces the coming of another
3. (noun) harbinger, forerunner, predecessor, herald, precursor
something that precedes and indicates the approach of something or someone
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| Definition of 'precursor' |
Webster Dictionary |
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1. (noun) precursor
one who, or that which, precedes an event, and indicates its approach; a forerunner; a harbinger
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| Definition of 'precursor' |
Dictionary of Military and Associated Terms |
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1. precursor
Any chemical reactant which takes place at any stage in the production by whatever method of a toxic chemical. This includes any key component of a binary or multicomponent chemical system.
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Definitions of precursor 
