1) Cut open while still alive 2) Dissect 3) To dissect alive 4) To perform vivisection upon 
• (v. t.) To perform vivisection upon; to dissect alive.
To practice vivisection. ... (05 Mar 2000) ... 
Viv'i·sect` transitive verb To perform vivisection upon; to dissect alive. [ Colloq.] Pop. Sci. Monthly. 
Type: Term Pronunciation: viv-i-sekt′ Definitions: 1. To practice vivisection.
[v] - cut (a body) open while still alive
vivisect To perform operations on living animals that involve cutting into their bodies in order to gain knowledge of pathological or physiological processes.