Orthogony

noun
The structure of actuality; orthogonal futures and pasts that fluoresce from the universe as it is, and from those into others, and others, always at right angles to the stream of time.
Origin
Back-formation from ‘orthogonal’.
Source
Great Work of Time

Atavachron

noun
A device used to prepare a time traveller’s cellular structure and brain patterns for survival in their selected time period.
Origin
Derived from atavus (ancestor) and khrónos (time).
Source
Star Trek: The Original Series

Tempophone

noun
A telephone able to place calls across time and space.
Origin
Derived from tempus (time) and phone (sound).
Source
The Restaurant at the End of the Universe

Relastatic

noun
A device that holds the area within static, relative to the universe without.
Source
The Restaurant at the End of the Universe

Corsec

noun
A unit of time.
Origin
Possibly an abbreviation of ‘corrected’ (for time dilation) and ‘second’.
Source
The Island

Spimescape

noun
An augmented projection of the current locale.
Origin
Spime, an object that can be tracked in space and time.
Source
The Quantum Thief

Millenniaire

noun
A person who possesses a fortune of time.
Origin
Portmanteau of ‘millennium’ and ‘millionaire’.
Source
The Quantum Thief

Alternity

noun
A parallel timeline.
Origin
Abbreviated from ‘alternate reality’.
Source
Unholy Land

Anachronopede

noun
A vessel that allows the occupant to travel through time.
Origin
Derived from aná (upon), khrónos (time), and pedes (“one who walks”).
Source
The Shape of My Name

Chronopathic

adjective
Able to distort time.
Origin
Formed from khrónos (time) and the suffix -pathic (abnormality).
Source
The Crime and the Glory of Commander Suzdal

Parachronion

noun
A device enabling travel to parallel time lines.
Origin
Derived from pará (nearby) and khrónos (time).
Source
Eutopia

Terranaut

noun
The intrepid breed of men that go down into the uncharted seas of time gas below Earth’s crust.
Origin
Derived from terra (ground) and nautēs (traveller).
Source
The Night That All Time Broke Out