per‧i‧o‧don‧tal /ˌperiəʊˈdɒntl $ -oʊˈdɑːn-/
adjective technical[
Date: 1800-1900;
Origin: peri- (from Greek; PERICARDIUM) + Greek odous 'tooth']
relating to the part of the mouth at the base of the teeth:
periodontal disease [TahlilGaran] Dictionary of Contemporary English ▲