periodontoclasia
/ˌpɛrɪədɒntə(ʊ)ˈkleɪzɪə/ /ˌpɛrɪədɒntə(ʊ)ˈkleɪʒə/Medicine
noun
Destruction or degeneration of periodontal tissue.
Origin
Early 20th century; earliest use found in Items of Interest. From peri- + odonto- + ancient Greek κλάσις fracture, rupture + -ia.