urinary sand

u·ri·nar·y sand

multiple small calculous particles passed in the urine of people with nephrolithiasis; each particle is usually too small to cause significant symptoms or be identified as a true calculus.
Farlex Partner Medical Dictionary © Farlex 2012

u·ri·nar·y sand

(yūr'i-nar-ē sand)
Multiple small calculous particles passed in the urine of patients with nephrolithiasis; each particle is usually too small to cause significant symptoms or to be identified as a true calculus.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012