Marain

noun
The shared constructed language of the Culture.
Origin
Possibly derived from maireannach (long-lived).
Source
Consider Phlebas

Tream

noun
A virtual reality scenario experienced via direct interface with the brain.
Origin
Portmanteau of ‘transmit’ and ‘dream’.
Source
The Algebraist

Loyaltician

noun
An advisor in matters of fealty.
Source
Surface Detail

Confliction

noun
A formal conflict within a virtual reality – i.e. one where the outcome matters beyond the confines of the battle environment itself.
Origin
Portmanteau of ‘conflict’ and ‘simulation’.
Source
Surface Detail

Revent

verb
The act of transferring the extracted mind-state of a dead person into a fresh body.
Origin
Derived from rĕ- (again) and veniō (“I come”).
Source
Surface Detail

Cryptosphere

noun proper
A networked worldwide data repository, containing the sum of recorded knowledge and populated by uploaded human minds.
Origin
Crypta (vault), from kruptós (hidden).
Source
Feersum Endjinn

Rollstar

noun
Interior stars of a Shellword which roll across the upper surface of each layer.
Source
Matter

Gridfire

noun
A method of creating a dimensional rift that releases astronomical amounts of energy into realspace from the energy grid between universes.
Source
Consider Phlebas

Nestworld

noun
A type of artificial habitat composed of multiple twisting tubes, complexly intertwined.
Source
Matter

Seatrider

noun
A personal air vehicle of which the pilot’s seat forms an integral part of the airframe.
Source
Matter

Avatoid

noun
An android acting as the avatar of a ship’s Mind.
Source
Matter

Shellworld

noun
An artificial planet comprising a solid core surrounded by a concentric succession of spherical shells.
Source
Matter