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BNC: 24429 COCA: 9469

sinus

noun
/ˈsaɪnəs/
/ˈsaɪnəs/
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  1. 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
    Topics Bodyc2
    Word Originlate Middle English (in the medical sense): from Latin, literally ‘a recess, bend’.

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