precursor
UK[priːˈkɜː.sər]US[priːˈkɜː.sər]
n
a person or thing that comes before another of the same kind; a forerunner
n
a substance from which another is formed, especially by metabolic reaction
Morpheme Breakdown
pre
cursor
pre
before
cursor
runner
Etymology
The word 'precursor' is a direct borrowing from Latin 'praecursor', meaning "a forerunner" or "one who runs ahead". It is composed of 'prae-' (before) and 'cursor' (runner). The literal image is of a scout or messenger running ahead of a main group to announce its arrival. Over time, this concrete meaning broadened into the modern abstract sense of any person, event, or thing that precedes and indicates the approach of a more significant successor, much like a herald precedes a king. The scientific meaning, referring to a chemical forerunner in a reaction, is a logical extension of this core idea.
Analysis
Structure: pre (before) + cursor (runner)
'pre-' is a Latin prefix meaning "before". 'cursor' is from the Latin 'cursor', meaning "runner", from the verb 'currere', "to run".
Examples
The invention of the telegraph was a major precursor to modern telecommunications.
This early political pamphlet is considered a precursor to the revolutionary manifesto.
Cholesterol is a precursor to several important hormones in the body.