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Definition of Olfactory bulb
Medically reviewed by Dr. Otari Nergadze, Neurosurgeon | Updated: January 2026
Olfactory bulb: A key part of the olfactory apparatus consisting of a bulbous enlargement of the end of the olfactory nerve on the under surface of the frontal lobe of each cerebral hemisphere just above the nasal cavity. Called also Morgagni's tubercle.