Precursor

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precursor

Something that precedes.

1. (Science: biochemistry) In biological processes, a substance from which another, usually more active or mature substance is formed.

2. In clinical medicine, a sign or symptom that heralds another.

Origin: L. Praecursor = a forerunner

Retrieved from "http://www.biology-online.org/bodict/index.php?title=Precursor&oldid=3288"
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