Minecraft wiki entry for Generator, associated text: Spawner, a block which generates mobs
Minecart with Spawner
The Overworld terrain generator
The various world generation types found in the game
The customized world generation type
A term for Farming
Cobblestone generator, a kind of farm which relies on lava and water to create cobblestone
Basalt generator, a kind of farm which relies on blue ice, soul soil, and lava, to generate basalt