nasal sinus

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Noun1.nasal sinus - any of the paired sinuses in the bones of the face adjacent to the nasal cavity that are lined with mucous membrane that is continuous with the lining of the nasal cavitiesnasal sinus - any of the paired sinuses in the bones of the face adjacent to the nasal cavity that are lined with mucous membrane that is continuous with the lining of the nasal cavities
sinus - any of various air-filled cavities especially in the bones of the skull
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References in periodicals archive
Relationship between anatomic variations of nasal sinus and chronic sinusitis.
An official at Nizwa Hospital said, "The ENT Department and the Anaesthesiology Department were able to perform a critical operation to remove a nasal sinus tumor," adding that the patient suffered from a heart condition that made it 20 per cent weaker than a healthy heart.
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