Hilfer

noun informal
An ethnologist of high intelligence life forms.
Source
Rocannon’s World

Hilf

noun
Acronym of “high intelligence life form”.
Source
Planet of Exile

Farborn

noun archaic
A person not native to the planet they are inhabiting.
Source
Planet of Exile

Exocluster

adjective
Of an ansible: one who sings the twinning song but is not part of a cluster.
Source
Waiting on a Bright Moon

Ansible

noun
A device that allows instantaneous communication over any distance.
Origin
Contraction of ‘answerable’.
Source
Rocannon’s World

Necrosphere

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

Neantics

noun
The ontology of nothingness.
Origin
Derived from neán (young).
Source
The Sanatorium of Dr Vliperdius

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

Batcar

noun
A battery-powered vehicle.
Source
The Lathe of Heaven

Urbapt

noun
An apartment in a high-density urban zone.
Source
True Names

Psychopraxiscope

noun
A device purported to offer instantaneous viewing of any subject’s thoughts.
Source
Great Breakthroughs in Darkness