The Collaborative International Dictionary of English v.0.48:
Vivisect \Viv"i*sect`\, v. t. To perform vivisection upon; to dissect alive. [Colloq.] --Pop. Sci. Monthly. [1913 Webster]WordNet (r) 3.0 (2006):
vivisect v 1: cut (a body) open while still alive; "people no longer vivisect animals--it's considered unethical"