umls-concept:C0026399 | skos:definition | MSH: A replication-defective murine sarcoma virus (SARCOMA VIRUSES, MURINE) isolated from a rhabdomyosarcoma by Moloney in 1966.,NCI: A replication-defective murine sarcoma virus isolated from a rhabdomyosarcoma by Moloney in 1966. (MeSH) | lld:umls |