noun
: the ratio representing the difference between water assimilated into the body and that lost from the body (as in urine, feces, and sweat) and being under average conditions approximately equal to unity
noun
: the ratio representing the difference between water assimilated into the body and that lost from the body (as in urine, feces, and sweat) and being under average conditions approximately equal to unity
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012