sylvian fossa

noun, often capitalized 1st S

Medical Definition of sylvian fossa

: a depression that forms in the lateral surface of each embryonic cerebral hemisphere during the third month of development and contains the insula at its bottom which is later covered by the operculum whose edges form the border of the sylvian fissure

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Cite this Entry

“Sylvian fossa.” The Merriam-Webster.com Medical Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/medical/sylvian%20fossa. Accessed 8 December 2019.

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