folding

As an adjective, this word describes a specific functional design intended for portability and space-saving. It is most commonly paired with furniture or equipment, such as tables, chairs, or bicycles, implying a mechanical hinge or joint that allows the object to collapse.

As a noun, the term refers to the physical action of creating a crease or the biological process of molecular shaping. In scientific contexts, particularly biochemistry, it describes the critical transition of a protein from a linear chain into a functional 3D shape, where "misfolding" is a common related term used to describe pathological errors.