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Jacobson's organ

[jey-kuh b-suh nz] /ˈdʒeɪ kəb sənz/
noun, Anatomy, Zoology.
either of a pair of blind, tubular, olfactory sacs in the roof of the mouth, vestigial in humans but well-developed in many animals, especially reptiles.
Origin of Jacobson's organ
1870-75; named after L. L. Jacobson (died 1843), Danish anatomist Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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