per ‧ i ‧ o ‧ don ‧ tal /ˌperiəʊˈdɒntl $ -oʊˈdɑːn-/ BrE AmE 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
per ‧ i ‧ o ‧ don ‧ tal /ˌperiəʊˈdɒntl $ -oʊˈdɑːn-/ BrE AmE 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
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012