obligatory water loss

obligatory water loss

[əblig′ətôr′ē]
the volume of water required for daily urinary excretion of metabolic waste products. This amount of water loss is necessary to maintain normal health. See also optional water loss.

o·blig·a·to·ry wa·ter loss

(ŏ-blig'ă-tōr-ē waw'tĕr laws)
Minimal volume of urine that must be produced to dispose of dissolved wastes, which amounts to about 600 mOsm/day.
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References in periodicals archive ?
Individuals who cannot concentrate urine must produce a larger volume to excrete the daily metabolic load, subjecting them to greater obligatory water loss.