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That which precurses: a forerunner, predecessor, or indicator of approaching events.
- Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis:[…]. The evolutionary precursor of photosynthesis is still under debate, and a new study sheds light. The critical component of the photosyn
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One of the compounds that participates in the chemical reaction that produces another compound.
syn. antecedent · beforemath · foremath · precedent · precursor · progenitor
ant. aftermath · consecution · derivative · follower · sequel