That's because it's not "game of life jargon", it's "cellular automata" jargon. Which is a field of math and comes along with a bunch of math jargon from related fields.
I searched several of these terms and they are all specifically jargon of game of life enthusiasts, (i.e. search reaults are all on fansites related to game of life) not general cellular automata jargon.
conwaylife.com isn't just for GOL, although it is the main subject, there is an Other Cellular Automata forum.
also it's not really a fansite, it's a bit more academic than what would be considered a "fansite".