龈腭音 Traditional form: 齦齶音 Pinyin (reading): yín'èyīn Definitions: alveo-palatal sound (linguistics) Characters: 龈 - gums 腭 - palate, the roof of the mouth 音 - sound, tone, pitch, pronunciation Traditional characters: 齦 - gums 齶 - palate, the roof of the mouth 音 - sound, tone, pitch, pronunciation