齿龈音 Traditional form: 齒齦音 Pinyin (reading): chǐyínyīn Definitions: alveolar, apical, or supradental sound (linguistics) Characters: 齿 - teeth; gears, cogs; age 龈 - gums 音 - sound, tone, pitch, pronunciation Traditional characters: 齒 - teeth; gears, cogs; age 齦 - gums 音 - sound, tone, pitch, pronunciation