An abnormal fold in a lining membrane that obstructs a passage, as of mucous membrane in the urethra.
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- congenital paramyotonia,
- congenital pyloric stenosis,
- congenital stridor,
- congenital syphilis,
- congenital total lipodystrophy,
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.