龈擦音 Traditional form: 齦擦音 Pinyin (reading): yíncāyīn Definitions: alveolar fricative (linguistics) Characters: 龈 - gums 擦 - to clean, to erase, to polish; a brush 音 - sound, tone, pitch, pronunciation Traditional characters: 齦 - gums 擦 - to clean, to erase, to polish; a brush 音 - sound, tone, pitch, pronunciation