'fossa' definitions:

Definition of 'fossa'

(from WordNet)
noun
A concavity in a surface (especially an anatomical depression) [syn: pit, fossa]
noun
Monotypic genus of Madagascar civets closely related to palm civets [syn: Fossa, genus Fossa]
noun
Largest carnivore of Madagascar; intermediate in some respects between cats and civets [syn: fossa, fossa cat, Cryptoprocta ferox]

Definition of 'fossa'

From: GCIDE
  • fossa \fos"sa\, n.; pl. foss[ae]. [L., a ditch. See Fosse.] (Anat.) A pit, groove, cavity, or depression, of greater or less depth; as, the temporal fossa on the side of the skull; the nasal foss[ae] containing the nostrils in most birds. [1913 Webster]