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BNC: 24429 COCA: 9469

sinus

1 ENTRIES FOUND:
sinus /ˈsaɪnəs/ noun
plural sinuses
sinus
/ˈsaɪnəs/
noun
plural sinuses
Learner's definition of SINUS
[count]
: any of several spaces in the skull that connect with the nostrils窦;窦道usually plural通常用复数
often used before another noun常用于另一名词前

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