Medical Definition of articulation
1: the action or manner in which the parts come together at a joint <a sketch showing the articulation of the limbs>
2a: a joint between bones or cartilages in the vertebrate skeleton that is immovable when the bones are directly united, slightly movable when they are united by an intervening substance, or more or less freely movable when the articular surfaces are covered with smooth cartilage and surrounded by a joint capsule—see amphiarthrosis, diarthrosis, synarthrosisb: a movable joint between rigid parts of any animal (as between the segments of an insect appendage)
4a (1): the act of properly arranging artificial teeth (2): an arrangement of artificial teethb: occlusion 2a
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