Here be [https://undertale.com Undertale] spoilers. Proceed with caution.
Trust me: Undertale is the kind of game where you wanna go in blind. Not literally blind, mind you. I mean, like... "don't know anything about what's gonna happen beforehand" blind. There's a lot of story stuff going on with that game, and if you keep going though this article, you'll see something that won't make sense without that story stuff, or might give you a hint as to what to expect. And we wouldn't want that, would we? WOULD WE?
Also, if you're looking for the biology term... what the hell are you doing on this website?