(biology, medicine) Impaired patency of the urethra owing to any sort of fusion that either partially or completely obstructs its lumen (for example, stricture due to adhesions).
phenylketonuria
phenylketonuria
noun
(medicine) A metabolic disorder in which individuals lack the liver enzyme phenylalanine hydroxylase (PAH) which is needed to metabolize the amino acid phenylalanine.
