Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by origin]
6. biological material
7. animal material
8. [animal material by form or function]
9. [animal material by excretions, secretions, and fluids]
10. excrement

Narrower term/s

• lant

Anotations

Scope note:

Clear amber liquid (mammals, aquatic species) or grayish semisolid (birds, reptiles) excretion of metabolic waste from vertebrates. In mammals, urine is formed in the kidneys. It is a collection of water-soluble by-products of protein metabolism (urea, creatinine, uric acid, ammonia, etc.) mixed with salts and pigments. Urine has been used in cleaning, dyeing, and tanning.