Definition of sphenoid in English:

sphenoid

noun

(also sphenoid bone)
Anatomy
  • A compound bone that forms the base of the cranium, behind the eye and below the front part of the brain. It has two pairs of broad lateral “wings” and a number of other projections, and contains two air-filled sinuses.

    ‘A large groove (sinus of Breschet) may occur on the intracranial face, parallel to the coronal suture and extending from the bregma to the lesser wing of the sphenoid.’
    • ‘Another such feature are the deep internasal cavities on either side of the sphenoid.’
    • ‘Metastasis to the brain can occur by way of Batson's plexus or by direct extension from adjacent structures such as the sphenoid bone or sinuses.’
    • ‘It is attached superiorly to the spine of the sphenoid and the region of the petrotympanic fissure.’
    • ‘Somewhat further back, the dura has been separated from the body of the sphenoid bone.’

Pronunciation

sphenoid

/ˈsfēˌnoid/ /ˈsfiˌnɔɪd/

adjective

Anatomy
  • Relating to the sphenoid bone.

    ‘The maxillary sinus is most commonly involved; however, most patients with radiologic maxillary sinusitis have abnormalities of the ethmoid and sphenoid sinuses.’
    • ‘Magnetic resonance imaging showed a mass bilaterally in the nasopharynx and the sphenoid sinuses.’
    • ‘Its accuracy, however, is questionable in suspected ethmoid, frontal, or sphenoid involvement.’
    • ‘Further CT scans have not demonstrated any additional sphenoid sinus or skull base erosion nor recurrent tumour five years after surgery.’
    • ‘In 1998, the tumor recurred with involvement of the nasal cavity and sphenoid and ethmoid sinuses.’

Pronunciation

sphenoid

/ˈsfēˌnoid/ /ˈsfiˌnɔɪd/

Origin

Mid 18th century from modern Latin sphenoides, from Greek sphēnoeidēs, from sphēn ‘wedge’.