periodontal ligament
/ˈpiəɹɪədˌɒntəl ˈlɪɡəmənt/
n
English · periodontal ligament中文 · 牙周膜Español · ligamento alveolo-dentarioFrançais · ligament alvéolo-dentaire
意味：Fibrous connective tissue joining the cementum to the bone, thus fixing the tooth into its alveolus.