A letter of the Runic alphabet, present in the Elder Fuþark (ᚢ), the Anglo-Saxon Fuþorc (ᚢ, called ūr), and the Younger Fuþark (ᚢ, called úr), representing /u/ or /uː/ and associated with dross of metal (in the Old Norwegian rune poem), rain (in the Old Icelandic one), and the aurochs (in the Anglo-Saxon one).