Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “fossa”


noun [C]     /ˈfɒs.ə/ US  /ˈfɑs.ə/ (plural fossae) specialized
a natural hollow, especially in a bone: The pituitary gland sits in a bony fossa called the sellar turcica.Substances and structures in the body
(Definition of fossa noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of fossa

More definitions for “fossa”

Word of the Day

well in (with)

to have a good relationship with someone in which they like you and from which you get an advantage

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More