olfactory bulb
/ɒlˌfakt(ə)ri ˈbʌlb/Anatomy and Zoology
noun
A bulb-like terminal expansion of the telencephalon on which the olfactory nerve fibres end.
Origin
Mid 19th century; earliest use found in Robley Dunglison (1798–1869), physician and medical writer. From olfactory + bulb, apparently after post-classical Latin bulbus olfactorius.
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