Pronunciation: is'mus, -mi, -mus-ez
Definition: A constriction in the embryonic neural tube delineating the anterior portion of the rhombencephalon, the future metencephalon, from the more rostrally located mesenephalon.
Synonym(s): rhombencephalic isthmus
© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.