Protein in urine â known as proteinuria (pro-tee-NU-ree-uh) â is excess protein found in a urine sample. Protein is one of the substances identified during a test to analyze the content of your urine (urinalysis). Low levels of protein in urine are normal. Temporarily high levels of protein in urine aren't unusual either, particularly in younger people after exercise or during an illness. Persistently high levels of protein in urine may be a sign of kidney disease.
Princeton's WordNet(0.00 / 0 votes)Rate this definition: principal, school principal, head teacher, head(noun) the educator who has executive authority for a school. she sent unruly pupils to see the principal.
6. Principal is used also to denote the more important; as, the principal person. 7. In the English law, the chief person in some of the inns of chancery is called principal of the house. Principal is also used to designate the best of many things as, the best bed, the best table, and the like.n investments and banking, the principal refers to the person for whom a Broker executes an order; it may also mean the capital invested or the face amount of a loan. A principal in the first degree is the chief actor or perpetrator of a crime.