A common blood test, the blood urea nitrogen (BUN) test reveals important information about how well your kidneys and liver are working. A BUN test measures the amount of urea nitrogen that's in your blood. 1  Your liver produces ammonia â which contains nitrogen â after it breaks down proteins used by your body's cells.  The nitrogen combines with other elements, such as carbon, hydrogen and oxygen, to form urea, which is a chemical waste product.
Top Definition. Blad. Blad/blud/blood, blad being the london pronounciation of the word, is not a ''chav'' word. It actually comes from jamaica and comes from the meaning of brother, of part of ones blood line, saying that someone is close to them.op Definition. Blad. Blad/blud/blood, blad being the london pronounciation of the word, is not a ''chav'' word. It actually comes from jamaica and comes from the meaning of brother, of part of ones blood line, saying that someone is close to them.
uk â /blaÉªt/ us â /blaÉªt/. âº [ U ] a disease that damages and kills plants. âº [ S or U ] something that spoils or has a very bad effect on something, often for a long time: His arrival cast a blight on the wedding day. Thesaurus: synonyms and related words.