Read Edit View history 額竇 édòu frontal sinus Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 额窦/ 額竇 édòu frontal sinus the pocket of air located in the skull bone behind the forehead; frontal sinus Edit Delete References Add reference No references for this word.
额窦/ 額竇 édòu frontal sinus the pocket of air located in the skull bone behind the forehead; frontal sinus Edit Delete