From Pluralpedia, the collaborative plurality dictionary
exospace (n., adj.)
Synonymsexternal headspace
Applies toheadspaces
CoinerInfinity’s End System

An exospace is a headspace that appears via the body’s vision and possibly other senses in the meatspace. It’s overlaid similarly to augmented reality.

It may contain only other headmates, but may also include temporary and/or permanent objects or decorations that aren’t physically in the meatspace.