The term deflection crystal isn't even canon. It's never mentioned on screen.
I know that it is not mentioned onscreen, but it is in Probert's designs and I use the term because it at least keeps it simple and consistent to describe what I am talking about.
Interesting, I was sure someone mentioned a field governor in "Enterprise" at some point.
I remember reading about the "symmetrical warp governor" and the reference to Archer's father in periodicals before the 2001 show came out. I did not watch enough of that show to know if this key part of Archer's past actually ended up in a script, but I would consider it an official term for the show because:
1. It is better than not having a term to describe this component, and it appears on diagrams which makes it as official as pretty much any other label on any published diagram.
2. If I were to not use the term "symmetrical warp governor" then I'd prefer to just move the engine room to that space on the ship since that location makes a bit more sense in engineering terms, in my opinion.
