Definition of periodontium in English:

periodontium

(also periodontum)

noun

Anatomy
  • Originally: †the periodontal ligament, which invests the root of a tooth (obsolete). In later use: all the tissues surrounding and supporting a tooth, including the alveolar process, the cementum, and the gingiva, as well as the periodontal ligament.

Origin

Late 19th century; earliest use found in Thomas Bryant (1828–1914). From peri- + odonto- + scientific Latin -ium, probably after French périodonte.

Pronunciation

periodontium

/ˌpɛrɪəˈdɒntɪəm/