Spreizbewegung
Spreizbewegung is a German term that denotes a movement intended to increase spacing between parts. The word combines Spreizen (to spread apart) and Bewegung (movement) and is used as a generic descriptor in technical contexts rather than for a single, specific phenomenon.
In orthodontics, Spreizbewegung refers to the intentional widening of the dental arches by appliances that apply
In engineering and mechanics, Spreizbewegung describes any mechanism that causes outward spreading of components, such as
Not a standalone historical movement, Spreizbewegung is a technical descriptor whose meaning varies with the discipline.