(physics) A hypothetical object extending across a number of (often specified) spatial dimensions, with strings in string theory seen as one-dimensional examples.

plural of brane

plural of p-brane

(physics) A p-dimensional brane.

(informal, physics) A world that is a brane, with its own limited set of dimensions, in any of several brane cosmology theories.

plural of braneworld

(physics, astronomy) That does not involve a brane