"Vivisection" Natural Recordings by Native Speakers
Vivisection is the practice of cutting into a living animal for research or education purposes, often to study the internal functions of the body or to test the effects of certain treatments or substances. This can be done experimentally, in medical institutions or universities, or in other settings.
Giving birth to living offspring, especially mammals that produce live young, as opposed to laying eggs.
I couldn't find any word "viviperfuse" in the dictionary. It's possible that it's a made-up or rare term. If you could provide more context or information about where you encountered this word, I may be able to help you better.