额窦 édòu frontal sinus Definitions Defs Origin Strokes Stroke Words Sentences Sents 额窦 額竇 édòu frontal sinus the pocket of air located in the skull bone behind the forehead; frontal sinus Frequency Written text 0.110 per million Sources Frequency data BCC Corpus (BLCU)
额窦 額竇 édòu frontal sinus the pocket of air located in the skull bone behind the forehead; frontal sinus Frequency Written text 0.110 per million Sources Frequency data BCC Corpus (BLCU)
