superposable
Superposable is an adjective used in geometry, chemistry and related disciplines to describe whether two objects can be made to coincide exactly through rigid motions. In geometry and kinematics, two figures or shapes are superposable if there exists a translation and a rotation that maps one onto the other; equivalently, they are congruent under a rigid motion. In three dimensions this includes all proper rotations and translations, and in practice it means the objects have the same size and form.
In chemistry, the term is often applied to molecules. A molecule is said to be superposable with
Examples include spheres and cubes, which are trivially superposable with congruent copies, whereas many organic molecules
See also: symmetry, congruence, chirality, mirror image, rigid motion, isometry.