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Medical Definition of Isthmus of his
1. A constriction in the embryonic neural tube delineating the mesencephalon from the rhombencephalon, the anterior portion of the rhombencephalon connecting with the mesencephalon. Synonym: isthmus rhombencephali, isthmus of His. (05 Mar 2000)
Lexicographical Neighbors of Isthmus Of His
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