maple syrup urine disease
— Noun
– English
~ an inherited disorder of metabolism in which the urine has a odor characteristic of maple syrup; if untreated it can lead to mental retardation and death in early childhood
urine
— Noun
– English
~ liquid excretory product; "there was blood in his urine"; "the child had to make water"
uriniferous tubule
— Noun
– English
~ any of the small tubules that are the excretory units of the vertebrate kidney