output of output of excretion excreta EHDAA2_RETIRED:0003184 UBERON:0000324 AEO:0000184 BTO:0000491 excreted substance galen:Excretion UBERON:0007550 portion of excreted substance FMA:9674 waste substance UBERON:0000174 ENVO:02000022 uberon A portion of organism substance that is the product of an excretion process that will be eliminated from the body. An excretion process is elimination by an organism of the waste products that arise as a result of metabolic activity. excretion organism substance