hypersthenuria

[hī′pər-sthĕ-nurē-ə]
n.
  1. Excretion of urine of unusually high specific gravity and concentration of solutes, resulting usually from loss or deprivation of water.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.