gingivitis
noun [ U ] medical specialized uk/ˌdʒɪn.dʒɪˈvaɪ.tɪs/ us/ˌdʒɪn.dʒɪˈvaɪ.t̬əs/
牙龈炎
an infection of the gums (= the part of the mouth from which the teeth grow) which causes swelling, pain, and sometimes bleeding
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