hyposthenuria

noun

hy·​pos·​the·​nu·​ria hī-ˌpäs-thə-ˈn(y)u̇r-ē-ə 

: the secretion of urine of low specific gravity due to inability of the kidney to concentrate the urine normally

hyposthenuric

-ˈn(y)u̇r-ik 

adjective