Merriam-Webster Collegiate Dictionary - urine

 noun  Etymology: Middle English, from Anglo-French, from Latin urina, from urinari to dive; akin to Sanskrit var water and perhaps to Sanskrit var?ati it rains, Greek ourein to urinate  Date: 14th century waste material that is secreted by the kidney in vertebrates, is rich in end products of protein metabolism together with salts and pigments, and forms a clear amber and usually slightly acid fluid in mammals but is semisolid in birds and reptiles  • urinous adjective