| 释义 |
hinge joint noun[ C ] anatomy specializeduk /ˈhɪndʒ ˌdʒɔɪnt/ us /ˈhɪndʒ ˌdʒɔɪnt/ a joint(= a place in the body where two bones connect) that allows movement in only one direction, such as the knee or the elbow: Ball and socket joints allow a circular movement, whereas hinge joints allow less movement. The bone of the upper arm meets both the ulna and radius to form a hinge joint at the elbow. The knee joint is by nature a hinge joint, allowing flexion normally to a maximum of 135 degrees, but no extension. The ankle joint is a hinge joint, normally permitting movement in one plane. Although the knee is a hinge joint, meaning that it can only flex and extend, it is a very complex joint. SMART Vocabulary: related words and phrases Bone structures acetabular acetabulum acromial acromioclavicular acromion foramen magnum frontal bone glenoid gnathic gynecoid osteophyte osteotomy parietal parietal bone pectoral girdle TMJ trapezoidal triquetrum true rib tubercle |