nasal sinus

Noun
  1. 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 (synset 105261025)
    is a type of: sinus - any of various air-filled cavities especially in the bones of the skull
    same as: paranasal sinus, sinus paranasales

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