Fruit of Life
Fruit of Life (生命の実, seimei no mi) is something possessed by Adam and the Angels which grants them immortality and infinite power, in opposition to the Fruit of Knowledge possessed by Lilith and the Lilin.
In Rebuild, the Angels are known to possess the Fruit of Life, but no mention has been made of the S² Engine or a similar physical power source. The Fruit's nature remains swathed in mystery.
This article bears the unpleasant designation of "Stub." This is a Bad Thing. Provide a great service to NGE fan-geeks everywhere by making it awesomer!