That which alters or limits.
- biologic response m. agent that modifies host responses to neoplasms by enhancing immune systems or reconstituting impaired immune mechanisms.
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mod·i·fi·er 'mäd-ə-.fī(-ə)r n
1) one that modifies
2) a gene that modifies the effect of another
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mod·i·fi·er (modґĭ-fi″ər) an agent that changes the form or characteristics of an object or substance.Medical dictionary. 2011.