spacetime

In physics|lang=en terms the difference between spacetime and geometrodynamics

is that spacetime is (physics) an n''-dimensional continuum consisting of dimensions of both space & time normally spacetime is considered as having 4 dimensions (''x'', ''y'', ''z'', ''t ), but higher-dimensional spacetimes are often encountered in theoretical physics, eg the 5-dimensional spacetime of kaluza-klein theory or the 11 dimensions of spacetime in m-theory while geometrodynamics is (physics) any of several reformulations of general relativity that attempt to describe spacetime and associated phenomena completely in terms of geometry.

As nouns the difference between spacetime and geometrodynamics

is that spacetime is (uncountable|physics) the four-dimensional continuum of the three spatial dimensions plus time while geometrodynamics is (physics) any of several reformulations of general relativity that attempt to describe spacetime and associated phenomena completely in terms of geometry.

In physics|lang=en terms the difference between spacetime and worldsheet

is that spacetime is (physics) an n''-dimensional continuum consisting of dimensions of both space & time normally spacetime is considered as having 4 dimensions (''x'', ''y'', ''z'', ''t ), but higher-dimensional spacetimes are often encountered in theoretical physics, eg the 5-dimensional spacetime of kaluza-klein theory or the 11 dimensions of spacetime in m-theory while worldsheet is (physics) a two-dimensional manifold which describes the embedding of a string in spacetime, a direct generalization of the worldline of a particle in special and general relativity.

As nouns the difference between spacetime and worldsheet

is that spacetime is (uncountable|physics) the four-dimensional continuum of the three spatial dimensions plus time while worldsheet is (physics) a two-dimensional manifold which describes the embedding of a string in spacetime, a direct generalization of the worldline of a particle in special and general relativity.