Read Edit View history 乳突窦 rǔtūdòu mastoid antrum Origin Definitions Defs Strokes Stroke Words Sentences Sents 乳突窦 (乳突竇) rǔtūdòu mastoid antrum noun mastoid antrum (the air space behind the tympanic cavity) Frequency Written text 0.004 per million Sources Definitions CC-CEDICT Frequency data BCC Corpus (BLCU)
乳突窦 (乳突竇) rǔtūdòu mastoid antrum noun mastoid antrum (the air space behind the tympanic cavity) Frequency Written text 0.004 per million Sources Definitions CC-CEDICT Frequency data BCC Corpus (BLCU)