calculated body weight measurement total body water mass CMO:0003942 This measurement is a calculated/estimated value of the relative mass of total fluid in an organism. The two main fluid compartments are divided by the cell membrane into the extracellular fluid (ECF) and the intracellular fluid (ICF). total body fluid weight total body fluid mass TBW weight 2023-08-11T17:07:21Z slaulede clinical_measurement_ontology PMID:37191987