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The articular disk (meniscus) is a thin, oval plate of fibrocartilage present in several joints which separates synovial cavities. This separation of the cavity space allows for separate movements to occur in each space.
Ex : meniscus of knee joint, articular disks of the temporomandibular or stenoclavicular joints.
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).
General Anatomy > Joints; Articular system > Bony joints > Synovial joint; Diarthrosis > Meniscus