FOSSA By N., Sam M.S. - 1 the name that is given to a hollow or depressed area. In neuroanatomy they range from relatively large areas, to small regions like the ethmoid fossa for the olfactory bulb. FOSSA: "A fossa is a depressed area for a apparatus to sit in." Related Psychology Terms CEREBRAL CORTEX OLFACTORY RECEPTOR OLFACTORY EPITHELIUM HEARING (AUDITION) OLFACTORY TRACT APRAXIA (literally, “inability to act or do”) BRAIN WAVES (Electroencephalogram, EEG) MANIC-DEPRESSIVE REACTION (GENERAL) FAMILY CARE OLFACTORY BULB Cite this page: N., Sam M.S., "FOSSA," in PsychologyDictionary.org, May 11, 2013, https://psychologydictionary.org/fossa/ (accessed August 13, 2022).