Do·ce·tism 
(dō-sētĭz′əm, dōsə-tĭz′əm)
(dō-sētĭz′əm, dōsə-tĭz′əm)n.
The belief, especially associated with the Gnostics, that Jesus had no human body and only appeared to have died on the cross.
[Probably from Late Greek Dokētai, espousers of Docetism, from Greek dokein, to seem; see dek- in the Appendix of Indo-European roots.]
Do·cetist n.