Notchcube

noun
A grey brick slightly larger than a fist; the basic building block of many Supra City megastructures.
Origin
Presumed to be coined after the creator of Minecraft, Markus “Notch” Persson.
Source
The Causal Angel

Wildcode

noun plural
Rogue nanomachines.
Source
The Fractal Prince

Necrosphere

noun
An airborne swarm of self-organising inanimate matter.
Origin
Nekrós (the dead).
Source
The Invincible

Geotect

noun
A person who designs the topography of artificial land masses.
Origin
Formed from geo (Earth) and téktōn (builder).
Source
The Diamond Age