from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The lowermost portion of the vertebrate brain, continuous with the spinal cord, responsible for the control of respiration, circulation, and certain other bodily functions.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The lower portion of the brainstem.
from the GNU version of the Collaborative International Dictionary of English
- n. the posterior part of the brain connected with the spinal cord. It includes all the hindbrain except the cerebellum and pons, and from it a large part of the cranial nerves arise. It controls very largely respiration, circulation, swallowing, and other functions, and is the most vital part of the brain; -- called also bulb of the spinal cord. See Brain.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata)
New Latin medulla oblongāta : Latin medulla, medulla + New Latin oblongāta, feminine of oblongātus, oblong.(American Heritage® Dictionary of the English Language, Fourth Edition)
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