[jey-kuh b-suh nz]
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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019