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Urachus
- A cord or band of fibrous tissue extending from the bladder to the umbilicus.
Uraeum
- The posterior half of an animal.
Uraeus
- A serpent, or serpent's head and neck, represented on the front of the headdresses of divinities and sovereigns as an emblem of supreme power.
Ural
- Pertaining to, or designating, the Urals, a mountain range between Europe and Asia.
Uralite
- Amphibole resulting from the alternation of pyroxene by paramorphism. It is not uncommon in massive eruptive rocks.
Uralitization
- The change of pyroxene to amphibole by paramorphism.
Uranian
- Of or pertaining to the planet Uranus; as, the Uranian year.