Body Space or Junction
sphenoidal sinus
[ sfee-noid-uhl sahy-nuhs ]
Subclass of:
Nasal sinus
Definitions related to sphenoidal sinus:
  • (sphenoid sinus) A type of paranasal sinus (a hollow space in the bones around the nose). There are two large sphenoid sinuses in the sphenoid bone, which is behind the nose between the eyes. The sphenoid sinuses are lined with cells that make mucus to keep the nose from drying out.
    NCI Dictionary of Cancer Terms
    U.S. National Cancer Institute, 2021
  • (sphenoid sinus) Either of the paired paranasal sinuses, located in the anterior part of the body of the sphenoid bone and communicating with the superior meatus of the nasal cavity on the same side.
    NCI
    U.S. National Cancer Institute, 2021
  • (sphenoid sinus) One of the paired air spaces located in the body of the SPHENOID BONE behind the ETHMOID BONE in the middle of the skull. Sphenoid sinus communicates with the posterosuperior part of NASAL CAVITY on the same side.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
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