1. autopsy -- (perform an autopsy on a dead body; do a post-mortem)
autopsy can be used as a noun
1. autopsy, necropsy, postmortem, post-mortem, PM, postmortem examination, post-mortem examination -- (an examination and dissection of a dead body to determine cause of death or the changes produced by disease)
1.
Something may arise at the autopsy to explain it. - from The Mysterious Affair at Styles by Agatha Christie