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inoh

sinus

/ˈsaɪ.nəs/

Meaning 1

a channel for blood or fluid

“She felt pressure in her sinus during the cold.”
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Illustration of sinus: a channel for blood or fluid

Meaning 2

Cavities in the skull near the nose.

“He felt pressure in his sinus during the flight.”
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Illustration of sinus: Cavities in the skull near the nose.