periodonticsWiktionary 原文英美构词拆解periperi-前缀odontodonto-前缀ics-ics后缀peri-surrounding · nearodonto-tooth-icsForms nouns referring to fields of knowledge or practice. · Forms nouns referring to activities.词源说明From peri- + odonto- + -ics.释义名词noun1(dentistry) The study of supporting structures of teeth, including the gums, alveolar bone, cementum, and the periodontal ligament, and the diseases and conditions that affect them.同族词