this term the presence of blood in the urine.
Hematuria (Blood in the Urine) Points to Remember. 1  Hematuria is the presence of blood in a personâs urine. Gross hematuria is when a person can see the blood in his or her urine, and microscopic hematuria is when a person cannot see the blood in his or her urine, yet a health care professional can see it under a microscope.