Definition of "fossa" [‖Fos•sa]

• Anatomy A small cavity or depression, as in a bone. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "And the presence of the glands in this location might explain another unusual aspect of metriorhynchid cranial anatomy, namely the strange elongate, groove-like antorbital fossae present in these animals (the antorbital fossa is an accessory opening present on the side of the skull in archosaurs)."
• "Response to David: some books say that fossa is pronounced 'foosh', which would agree with your comment."
• "Dorian - a "fossa" - looks to us like a cross between a dog, a cat, a bat and a gerbil - or maybe a bear."