Interspace

Interspace is a general term for the space between two or more objects or regions. The word combines inter- meaning between with space, and the term is used across disciplines to denote gaps, pores, or intervals that affect physical properties or relationships.

In geometry and physics, interspace refers to the distance between entities, such as the gap between parallel lines or the space separating particles. The size of an interspace can influence measurements, forces, or transport processes that occur across it.

In engineering and architecture, interspaces occur in layered systems and assemblies. For example, the interspace in double-glazed windows is the air or gas-filled gap between panes that reduces thermal transfer. In composite materials, interspaces between fibers affect porosity, strength, and insulation characteristics.

In biology, interspaces describe spaces between cells (intercellular spaces) or within tissues (interstitial spaces). They play roles in diffusion, signaling, and fluid exchange, and can be relevant in contexts such as edema or nutrient transport.

In urban design and planning, interspaces describe open areas within the built environment, such as courtyards, plazas, and pedestrian corridors, which contribute to ventilation, daylighting, and public accessibility.

The term interspace may also appear in fictional works or branding as a label for spaces between components or concepts; such uses are varied and non-standard. See also interstice, gap, interval, and void.