sequestration [sequestrations](the process or act of sequestering; a putting aside or separating) noun [UK: ˌsiː.kwe.ˈstreɪʃ.n̩] [US: ˌse.kwə.ˈstreɪʃ.n̩]
sequestrum [sequestrums](a fragment of bone or other dead tissue) noun [UK: sɪ.ˈkwe.strəm] [US: sɪ.ˈkwe.strəm]