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fos·sa 1

n. pl. fos·sae (fŏs′ē′) Anatomy
A small cavity or depression, as in a bone.

[Latin, ditch, from feminine past participle of fodere, to dig.]

fos′sate′ (fŏs′āt′) adj.

fos·sa 2

A catlike carnivorous mammal (Cryptoprocta ferox) of Madagascar, having reddish-brown fur, a long tail, long whiskers, and retractile claws.

[Malagasy fosa.]


n, pl -sae (-siː)
(Anatomy) an anatomical depression, trench, or hollow area
[C19: from Latin: ditch, from fossus dug up, from fodere to dig up]


(Animals) a large primitive catlike viverrine mammal, Cryptoprocta ferox, inhabiting the forests of Madagascar: order Carnivora (carnivores). It has thick reddish-brown fur and preys on lemurs, poultry, etc
[from Malagasy]


(ˈfɒs ə)

n., pl. fos•sae (ˈfɒs i)
a pit, cavity, or depression, as in a bone.
[1820–30; < Latin: ditch, fosse, short for fossa (terra) dug or dug out (earth), n. use of feminine of fossus, past participle of fodere to dig]


(ˈfɒs ə)

n., pl. -sas.
a large viverrid carnivore, Cryptoprocta ferox, of Madagascar. Also called fos′sa cat`.
[1830–40; < Malagasy]


A shallow depression.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.fossa - a concavity in a surface (especially an anatomical depression)fossa - a concavity in a surface (especially an anatomical depression)
glenoid cavity, glenoid fossa - the concavity in the head of the scapula that receives the head of the humerus to form the shoulder joint
glenoid fossa, mandibular fossa - a deep concavity in the temporal bone at the root of the zygomatic arch that receives the condyle of the mandible
bodily cavity, cavum, cavity - (anatomy) a natural hollow or sinus within the body
epigastric fossa, pit of the stomach - a slight depression in the midline just below the sternum (where a blow can affect the solar plexus)
concave shape, concavity, incurvation, incurvature - a shape that curves or bends inward
2.Fossa - monotypic genus of Madagascar civets closely related to palm civets
mammal genus - a genus of mammals
fanaloka, Fossa fossa - civet of Madagascar
3.fossa - largest carnivore of Madagascarfossa - largest carnivore of Madagascar; intermediate in some respects between cats and civets
viverrine, viverrine mammal - small cat-like predatory mammals of warmer parts of the Old World


n. L. fosa, cavidad, hueco, depresión;
___ glenoid___ glenoidea;
___ interpeduncular___ interpeduncular;
___ jugular___ yugular;
___ mandibular___ mandibular;
___ nasal___ nasal;
___ navicular___ navicular.


n fosa
References in periodicals archive ?
The prognosis is worse when incomplete excision is seen at the infratemporal fossa and/or base of skull and therefore the anatomic site of involved margins must be clearly specified and marked on a diagram (Figure 9) during macroscopic and microscopic examination.
It has an average distance of 10.18 mm and 7.6 mm to the maxillary artery groove and maxillary nerve groove respectively, so it's an anatomical structure that should be considered as a parameter for the surgical approach of the infratemporal fossa and the neurovascular elements contained in it.
Reports have been suggested that there are higher possibilities of retained soft tissue tumour islands during the surgical procedure in the complex regions like infratemporal fossa [34, 35].
In the presented case, a watch-and-wait approach could not be adopted because the desmoid fibromatosis was symptomatic and was having an aggressive course, growing rapidly, and infiltrating the adjacent anatomical structures such as the lateral orbital wall, maxillary sinus, and temporal cavity and infratemporal fossa. Moreover, the neoplasia had already caused the loss of visual acuity in a short period of time.
This minimally invasive approach provided a safe and wide exposure of the lower clivus, anterior rim of the foramen magnum, C1 transverse process, occipital condyle, vertebral artery, posterior inferior cerebellar artery, and even the infratemporal fossa. It also allowed effective control of intraoperative extradural bleeding.
As for the extent, we recorded if the lesion involved the skull base and intracranial cavity in addition to the nasopharynx and infratemporal fossa. We compared the signal intensity of the lesions with that of the brain stem on T1-weighted and fat-suppressed T2-weighted images.
Sagittal reconstruction of CT (c) showed the long piece penetrating into the middle cranial fossa through infratemporal fossa. A small piece of bone fragment (hollow arrowhead, *) was noticed above the long piece.
Infection also may spread extracranially involving the infratemporal fossa, parotid, and neck, leading to the involvement of surrounding structures and formation of abscess [11].
The tumor is pushed superiorly into infratemporal fossa. The attachment of the parapharyngeal tumor to the infratemporal tumor was cut near the foramen ovale (Figures 4 and 5).
Abscess of the infratemporal fossa is a rare complication which can be difficult to diagnose.
Bodener et al14 reported a case of a teenage girl with a larger peripheral Osteoma of mandible occupying the infratemporal fossa, causing trismus and shift of the mandible on mouth opening.
On magnetic resonance imaging (MRI) there was a soft tissue density mass measuring 45x27x31 mmin CCxTxAP dimensions occupying left infratemporal fossa and left maxillary antrum, hypointense on T1, mixed signal intensity on T2 with significant post contrast enhancement.

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