lung dry weight to body weight ratio A calculated measurement in which the weight after dessication of one or both lungs, the organ component of the respiratory system responsible for the exchange of gases between the environment and the blood, is divided by the total weight of the body and presented as a ratio, fraction, quotient or percentage. CMO:0000102 VT:0005629 clinical_measurement_ontology lung weight, dry/body weight ratio lung weight to body weight ratio