Cosmeg

noun
A single star containing all the mass in the universe.
Origin
Abbreviated from ‘cosmic egg’.
Source
The Gods Themselves

Emmish

adjective informal
Behaviour characteristic of an Emotional (as distinct from a Parental or a Rational).
Source
The Gods Themselves

Robotics

noun
A branch of technology dealing with the design, construction, operation, and application of robots.
Source
Liar!

Visicastor

noun
A video broadcaster.
Origin
Formed from visio (vision) and ‘broadcast’.
Source
Second Foundation

Trimensional

adjective
Having or appearing to have length, breadth, and depth: a three-dimensional object.
Origin
Derived from triplus (triple).
Source
Foundation

Psychohistory

noun
A branch of mathematics dealing with the reactions of human conglomerates to fixed social and economic stimuli.
Source
Foundation