si·nus
noun/ˈsaɪnəs/
/ˈsaɪnəs/
- any of the hollow spaces in the bones of the head that are connected to the inside of the nose
窦；窦道 - blocked sinuses
窦性传导阻滞
Word Originlate Middle English (in the medical sense): from Latin, literally ‘a recess, bend’. - blocked sinuses