Also means
sine (mathematics)
Usage Note
Sinus covers two distinct uses: in anatomy, the air cavities in the skull (les sinus nasaux), and in mathematics, the trigonometric sine function. The plural is identical in form — les sinus. Une sinusite is the common word for a sinus infection.
Examples
"J'ai les sinus complètement bouchés ce matin."
Natural Translation
My sinuses are completely blocked this morning.
Literal Translation
I-have the sinuses completely blocked this morning
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