Habeas corpus
Habeas corpus (hā"be*as kôr"pus)
[Latin you may have the body.]
(Law) A writ having for its object to bring a party before a court or judge; especially, one to inquire into the cause of a person's imprisonment or detention by another, with the view to protect the right to personal liberty; also, one to bring a prisoner into court to testify in a pending trial. — Bouvier