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orphan disease

[ ôrfən ]
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n.

A disease that is so rare that it is not considered commercially viable to develop drugs to treat it.

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The verb tenses can be split into which 3 primary categories?

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

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