reinsurance
insurance that is purchased by an insurance company, in which some part of its own insurance liabilities is passed on to another insurance company
en-GB/ˌɹiːɪnˈʃɔːɹəns/
en-US/ˌɹiɪnˈʃʊɹəns/
insurance that is purchased by an insurance company, in which some part of its own insurance liabilities is passed on to another insurance company