fossa
UK[ˈfɒsə]US[ˈfɑːsə]
n
A shallow depression or hollow in a bone or other anatomical structure.
n
A large, carnivorous, cat-like mammal native to Madagascar.
Etymology
The word 'fossa' entered English directly from Latin, retaining its original spelling and meaning of "ditch" or "trench." This Latin term is derived from the past participle of the verb 'fodere,' meaning "to dig." The anatomical sense, referring to a depression or groove, is a direct metaphorical extension from a dug-out trench. The zoological application to the Malagasy carnivore is a modern taxonomic adoption, likely inspired by the animal's fossorial (digging) habits or perhaps the deep-set nature of its eye sockets, creating a superficial resemblance to a trench.
Analysis
The word 'fossa' is a direct borrowing from Latin, where it means "ditch" or "trench." It functions as a complete lexical unit in English.
Examples
The olecranon fossa is a depression on the posterior aspect of the humerus.
The fossa is the largest mammalian predator on the island of Madagascar.
A small fossa was noted on the surface of the bone, indicating an attachment site for a ligament.