齿擦音 chǐcāyīn dental fricative Origin Definitions Defs Strokes Stroke Words Sentences Sents 齿 齒 chǐ noun tooth (bound form) tooth; teeth; refers specifically to the organs in the mouth used for chewing, as in 牙齿 yáchǐ擦音 cāyīn fricative A consonant sound produced by forcing air through a narrow channel in the vocal tract; also called 摩擦音 mócāyīn.