#mechanical hinge

• Articulated — Describing sounds, syllables, or words that are pronounced clearly, distinctly, and intelligibly, forming the basic elements of human speech; in grammar, it defines a noun or adjective accompanied by a grammatical article (definite or indefinite) to express its structural determination. In anatomy and mechanics, it describes a system formed of independent elements joined by mobile joints or junctions, allowing flexible angular movements and controlled rotations.
• Joint — A structural anatomical formation joining two or more bones, allowing mobility of skeletal segments (diarthrosis) or their rigid fixation (synarthrosis); a movable mechanical link made through pivots, hinges, or bearings joining machine parts; (in phonetics) the totality of movements executed by vocal organs to produce a sound; (in music) a way of structurally linking and interpreting musical notes.