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exogen
This term is primarily used in specialized scientific contexts, particularly in biochemistry, pharmacology, and cellular biology. It describes any external agent introduced into a biological system to trigger a specific reaction or maintain a function, contrasting sharply with an endogen, which is produced internally by the organism.
Because it is a technical term of art, it is rarely encountered in general conversation and is almost exclusively found in peer-reviewed literature or laboratory reports. It carries a neutral, descriptive tone and focuses on the origin of the substance rather than its specific chemical identity.
Meanings
Examples
The researcher identified the compound as an exogen introduced during the trial.
The system reacted poorly to the presence of an exogen.
We must determine if the chemical is a natural exogen.
An exogen can significantly alter the metabolic rate of the cell.
I wonder if this specific exogen is responsible for the mutation.
The patient was treated with a synthetic exogen to stabilize the reaction.
Certain plants rely on an exogen from the soil to trigger flowering.