What does "proteinuria" mean?

The presence of protein in the urine (which is always true in small amounts); and usually, more specifically, an excess (hyperproteinuria).

What is a synonym for "proteinuria"?

Common synonyms include: albuminuria.

Pronounced //ˌpɹoʊtiːnˈjʊɹiə//.

/ˌpɹoʊtiːnˈjʊɹiə/ noun

noun ·Rare ·Advanced level

Noun

1
The presence of protein in the urine (which is always true in small amounts); and usually, more specifically, an excess (hyperproteinuria). countable, uncountable
2
the presence of excessive protein (chiefly albumin but also globulin) in the urine; usually a symptom of kidney disorder wordnet

From protein + -uria.