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Articular facet for sternum
This is an irregular oval-shaped surface that is typically pitted rather than smooth. It articulates with the manubrium indirectly as an intervening articular disk interposes in the joint.
Facet, literally means a little face. It came into English via the French diminutive facette that came from the Latin facies or face. Anatomically, the term describes smooth, flat surfaces. Sternum comes from the Greek word sternon meaning breast. It was first used by Claudius Galen in the 2nd Century. The Latin form sternum was not used by the Romans. It came into the English in the 17th Century.