Definitions
There is 1 meaning of the phrase
Paranasal Sinus.
Paranasal Sinus - as a noun
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
Synonyms (Exact Relations)
nasal sinussinus paranasalesExample Sentences
"The presence of paranasal sinus polyps can cause breathing difficulties."