folded

Folded is the past participle of fold and is used as an adjective to describe objects or structures created by bending a material along lines or creases. Common examples include folded paper, folded clothing, and origami. A folded edge or seam results when a material is doubled over and pressed flat.

In biology and chemistry, folding describes how a chain molecule assumes a three-dimensional structure. Protein folding is the process by which a polypeptide chain attains its functional conformation; misfolding can lead to diseases such as Alzheimer's or prion diseases. In chemistry, folded conformations describe spatial arrangements of molecules produced by rotation about bonds.

In mathematics and computer science, folding is an operation that reduces a data structure by applying a function to its elements. In functional programming, fold (also called reduce or accumulate) traverses a list to produce a single result. In geometry and origami, folding describes the creation of creases that transform a flat surface into a three-dimensional object.

In electronics and radio engineering, a folded dipole is a type of antenna that uses a folded conductor to achieve particular impedance characteristics and bandwidth.