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rhombencephalic isthmus in Medicine

rhombencephalic isthmus

(rŏm′bĕn-sə-fălĭk)
n.
  1. A narrow portion in the embryonic neural tube delineating the mesencephalon from the rhombencephalon.
  2. The anterior portion of the rhombencephalon that connects with the mesencephalon.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.