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.
In general usage principal refers to a person who plays an important role or holds a high position: Last week, there was a meeting among the principals in the deal. In legal and financial English, however, principal is often a noun (from principal person).In the law of agency, the principal is the one on whose behalf the agent acts: She attended the meeting as the agent of a principal who wished to remain anonymous.n general usage principal refers to a person who plays an important role or holds a high position: Last week, there was a meeting among the principals in the deal. In legal and financial English, however, principal is often a noun (from principal person).