kinematic pair
physical system of two bodies connected to limit their relative movement
coupling
mechanical connection between two objects
hinge
mechanical bearing that connects two solid objects (usually flat objects like doors), typically allowing only a limited angle of rotation between them
joint
rotational kinematic pair
Knuckle joint
flexible mechanical joint with one degree of freedom
ball joint
coupling alternative
joint
point at which parts of an structure are joined
flexure pivot
Flexure pivoting by bending a flexible part, allowing hinge-like or (more rarely) spherical angular motion. Used in precision mechanics or egg containers