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.
Continue reading... The word, principal, comes from the Latin principalis first in importance and is related to the title of prince. You can see the relation when you think about its meanings â the head of a school, the starring actor in a film, and the client of an agent. Don't confuse principal with its homophone principle, a moral rule or law of nature.