齿龈 chǐyín gums Origin Definitions Defs Strokes Stroke Words Sentences Sents 齿龈炎 chǐyínyán gingivitis gum disease characterized by inflammation of the gums齿龈音 chǐyínyīn alveolar sound a speech sound produced by the tongue touching or approaching the ridge behind the upper teeth; also called an apical or supradental sound