Jacobson's organ

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Ja·cob·son's organ

(jā′kəb-sənz, -kəp-)
[After Ludwig Lewin Jacobson (1783-1843), Danish anatomist.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Ja′cob•son's or′gan

(ˈdʒeɪ kəb sənz)

either of a pair of olfactory pockets in the roof of the mouth, absent in primates but well-developed in many vertebrates, esp. reptiles.
[1870–75; after Latin. Latin. Jacobson (1783–1843), Danish anatomist]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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References in periodicals archive ?
In addition, dogs have a second smelling device in the backs of their noses that we don't have, called the Jacobson's organ.
"Like snakes, dogs have a sensory trigger called the Jacobson's Organ, which can collect chemicals from the air, and also from the water, and the dogs may use this to confirm the indication of a body.
Its basis, according to the Humane Society of U.S.: "Your cat's sense of smell is so essential to him that he actually has an extra olfactory organ that very few other creatures have: the Jacobson's organ [also known as the vomeronasal organ].
Key words: Vemeronasal organ, Jacobson's Organ, Vemeronasal Nerves pheromone, Olfactory pathways.