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]
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