URR
Encyclopedia
URR or Urr may refer to:
- Urea reduction ratio, used to quantify dialysis treatment adequacy
- Urr WaterUrr WaterUrr Water or River Urr is a river in southwest Scotland.Entirely within Dumfries and Galloway, the Urr Water originates at Glenlair, and flows southwards for thirty miles from Loch Urr to its outflow into the Solway Firth at Rough Firth...
, a river in Scotland - Haugh of UrrHaugh of UrrHaugh of Urr, is a village in the Urr parish, Kirkcudbrightshire, in South West Scotland. It is approximately NNW of Dalbeattie, NE of Castle Douglas, 12½ miles west of Dumfries and 12½ miles east of Kirkcudbright. It is pronounced hoch of ur, with Haugh rhyming with the Scottish pronunciation of...
, a village by the Urr Water, in the Urr parish - Motte of Urr, a "motte-and-bailey" castle near the Haugh of Urr, beside the Urr Water
- Union Railroad (disambiguation), or more particularly the Union Railroad (Pennsylvania)
- Underground RailroadUnderground RailroadThe Underground Railroad was an informal network of secret routes and safe houses used by 19th-century black slaves in the United States to escape to free states and Canada with the aid of abolitionists and allies who were sympathetic to their cause. The term is also applied to the abolitionists,...
, an informal network of secret routes and safe houses used by 19th-century black slaves in the United States to escape to free states and Canada