paranasal sinus

1 definition found

paranasal sinus - WordNet (r) 2.1 (2005) :

  paranasal sinus
      n 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
           [syn: paranasal sinus, sinus paranasales, nasal sinus
           ]