Happy now? Some of your arguments I can understand (I can see why you're saying a fetus isn't a parasite based on your sources, for example), but arguing something this obviously wrong is really making me question your opinions of everything. You have teachers, yes? In high school or college or whatever school you're in? Please do me a favor and ask a biology teacher if cells are alive instead of trying to interpret it yourself and being rude when people contradict you.
After looking it up, you're right, the other definitions online specify two species. Although, just putting this out there, the way you're acting makes me not want to even associate with you enough to agree now that a fetus isn't a parasite, because you're being outright rude. Can you please tone it down a bit for a less "i mad" discussion?
Also, the biology part made me lol, because of the cell part above. That argument really doesn't have much to do with a fetus anymore, but the fact that you're arguing quite heatedly that cells aren't alive frankly worries me, because that's a very basic fact that's taught to children and if you believe otherwise, maybe there's an issue in the educational system in your area or something. I don't like thinking that people may not know something as basic as "cells are alive". It was hard to even find sources that didn't cater to children :/