bun: Meaning and Definition of | Infoplease
blood urea nitrogen: the concentration of nitrogen in the blood in the form of urea, indicating kidney function. ...
Trinidad and Tobago | Facts & Information | Infoplease
Exports: $12.86 billion (2013 est.): petroleum and petroleum products, liquefied natural gas, methanol, ammonia, urea, steel ... urea, steel products, beverages, food processing, cement, cotton textiles. Natural resources: petroleum, natural gas, asphalt. ...