Geotect

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

Loglo

noun
Skyglow caused by neon advertisements feauturing corporate logos.
Origin
Abbreviation of ‘logo glow’.
Source
Snow Crash

Ractor

noun
A professional performer of interactive fiction.
Origin
Abbreviation of ‘interactive (“ractive”) actor’.
Source
The Diamond Age

Burbclave

noun
A fortified private surburb with its own by-laws and police force.
Origin
Portmanteau of ‘suburb’ and ‘enclave’.
Source
Snow Crash