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fossa Definition

fossa (fäsə, fôsə)

noun pl. -·sae-ē, --ī

Anat. a cavity, pit, or small hollow

Etymology: ModL < L, a ditch, trench < fossus: see fossil

fossa Related Forms
fos·sate′ (-āt′, ---it) adjective
fossa Usage Examples

Converse of object

  • enter: Several branchial motor nerves are also given off as the mandibular nerve enters the infratemporal fossa.

Adjective modifier

  • antecubital: In adults use the upper limb at the medial aspect of the antecubital fossa.
  • iliac: In many cases a mass of stool may be felt in the left iliac fossa.
  • glenoid: At less than 90 degrees of abduction the deltoid muscle force creates a shear vector in the glenoid fossa.
  • popliteal: Care was taken to ensure that there was no constriction at the popliteal fossa.
  • cranial: Cerebellum - occupies most of the posterior cranial fossa; damage produces ataxia, slurring of speech.
  • posterior: CT scan provides a poor resolution in the posterior fossa.

Modifies a noun

  • pain: Right iliac fossa pain ( 99kb ) I Singh, REC Collins British Journal of Hospital Medicine, Vol.
  • ovalis: In the adult heart, the remnant of the foramen ovale is an oval depression, which is called the fossa ovalis.
  • mass: The most frequent clinical sign was a lumbar fossa mass.
  • approach: All patients underwent primary surgical resection, and the lateral infratemporal middle fossa approach was used in 20 patients.
  • tenderness: Examination was normal except for mild left iliac fossa tenderness.
  • tumor: Shunts are often inserted in early childhood although adults may also develop intracranial hypertension, particularly with posterior fossa tumors.

Noun used with modifier

  • olecranon: Full extension of the joint is blocked by the olecranon of the ulna contacting the olecranon fossa on the back of the humerus.