Coterminous: An obscure term from [Dungeons and Dragons] Third Edition. It applies to [interdimensional] [travel], and is the adjective to describe two [plane]s of [existence] that have a [portal] allowing travel in-between. Another way to think of this is to use the example of two adjoining rooms. There is a doorway between them alowing you to go from the end of one, to the start of the other.

For example- To get from the Plane of [Fire] to the Plane of [Earth], there is a single [portal] that has a gate on Mt. Mansiuis (on the [Fire] [plane]) and a gate in the Terran Transport Post (on the [Earth] Plane). They are therefore considered coterminous, because there is a form of travel that links them together.

Synonyms: [Coexistant], [linked], [entangled], [tied], [connected], [interwoven].
Antonyms: [Opposed], [distant], [self-contained].

Use In Conversation: (kind of odd, but if you do need to use it...)

[Dungeon Master]: You walk through the gate on the [Plane] of [Water], and appear on the [Plane] of [Air], near the city of Agralia.
Player: So the Plane of Air and the Plane of Water are coterminous in this campaign?
DM: Yes.
Player: Are they coterminous in any other places, other than this portal we just traversed?
DM: Maybe, maybe not. You have some exploring to do....

For more, see the [Manual of the Planes] node.

coterminous (idea)