| The American Heritage® Dictionary of the English Language: Fourth Edition. 2000. |
| biological response modifier |
| NOUN: | A substance, such as interferon, that is produced naturally or manufactured as a drug designed to strengthen, direct, or restore the body's immune response against infection or cancer. |
| The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved. | |
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