1. A concavity in a surface (especially an anatomical depression)
   "The fossa at the base of the skull houses important nerves";
   - pit
    
2. Largest carnivore of Madagascar; intermediate in some respects between cats and civets
   "The fossa moved through the trees with cat-like agility";
   - fossa cat, Cryptoprocta ferox

1. Monotypic genus of Madagascar civets closely related to palm civets
   - genus Fossa

Derived forms: fossae

Type of: bodily cavity, cavity, cavum, concave shape, concavity, incurvation, incurvature, mammal genus, viverrine, viverrine mammal

Part of: family Viverridae, family Viverrinae, Viverridae, Viverrinae

Encyclopedia: Fossa, Italy