Alethiometer
A golden compass like device with three hands and 36 symbols; Derived from the Greek words "aletheia" for 'truth' and "meter" for measure, it is literally translated a truth measurer
Anbaric
Electric
Clouded Mountain
Portable heart of the kingdom; where Metatron and the Authority reside
Daemon
The outward manifestation of a person's soul in certain Universes. Daemons are represented as animals indicative of a person's personality. They can change form in childhood but settle on one permanent form at puberty.
Divination
A supernatural or divine means of gaining knowledge; examples include the use of the alethiometer & Mary's use of I Ching
Dust
Dark Matter; building blocks of Universe, what Angels are made of
Gallivespian
Race of people about the size of a human hand (6 inches roughly) armed with deadly poisonous spurs
Gyropter
Hellicopter
Metatron
Formerly a human, Enoch, he became Regent & exercised the will of the Authority
Spectres
Creatures that feed on Dust they kill those they come in contact with; invisible to children they only attack adults; they are created by the void between worlds
The Authority
First of all angels formed by Dust; assumed the role of creater
The Knife
Reference to 'the subtle knife'; a knife that can cut through openings to alternate universes