urine volume measurement method metabolic cage urine volume measurement method 2014-03-10T11:20:37Z A method which utilizes a metabolic cage, a housing unit constructed for the separate collection of liquid and solid wastes and in some cases for measurement of liquid waste, to determine the size of the three dimensional space occupied by a sample of urine, the fluid waste product excreted by the kidneys. JSmith MMO:0000511 measurement_method_ontology