The Y-Axis of Pizza

cylindrical would make more sense...

Perhaps you're right. I'll still use spherical for calzones though.

In two coordinates, y is up. Why isn't that in three coordinates?

It's just preference I guess. In college one of my math professors always defined x to be the horizontal axis, y to be vertical, and z was coming out of the whiteboard. Yet my other professors preferred z to be vertical.
 
When one professor mentioned that engineers often make up the y - axis instead of z, many of the students at the lecture laughed. And oh my god now I hate them.
 
No, I prefer y as up. Not sure what I miscommunicated here, but those were (rather smug) physics and math students.
 
Well frothing vitriol is clearly much better than smugness :)
 
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