A person who engages in struggle or competition; in pharmacology, a substance that binds to and activates a receptor in cells. Used in Romance languages more commonly than English.
From Latin 'agonista,' derived from Greek 'agonistes' (competitor, contestant). In modern usage, especially pharmacology, it's borrowed directly from scientific nomenclature across multiple languages.
In pharmacy, agonists and antagonists have a fascinating relationship—an agonist is like a key that fits a lock and turns it, while an antagonist is a key that fits but refuses to turn. Scientists use words from ancient Greek wrestling to describe molecular combat.
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