orphan drug

orphan drug

noun
Pharmacology. a drug that remains undeveloped or untested or is otherwise neglected because of limited potential for commercial gain.

Origin:
1975–80

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

orphan drug or·phan drug (ôr'fən)
n.
Any of various drugs or biologicals that may be useful in treating disease but are not considered to be commercially viable.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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