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brain stem
noun
: the part of the brain composed of the midbrain, pons, and medulla oblongata and connecting the spinal cord with the forebrain and cerebrum
Examples of brain stem in a Sentence
Recent Examples on the Web
Like Mason noted, the ABC Sports control room (the brain stem of the operation, so-to-speak) was the key aspect of the entire film, whose success hinged on a convincing recreation.
—Josh Weiss, Forbes, 6 Jan. 2025
Some other examples include lung diseases such as pneumonia, metabolic disorders such as hypocalcemia, kidney diseases like renal cell carcinoma, and hiccups can also be a symptom of tumors in the brain stem or stomach.
—Daryl Austin, USA TODAY, 18 Nov. 2024
The bullet entered the right side of the infant’s face and exited the back of her head, missing her brain stem by a few centimeters.
—John Johnston, The Enquirer, 28 Nov. 2024
The researchers attached electrodes for brain stem monitoring, took blood samples and attached satellite tracking tags to follow up on the animals’ behavior and welfare.
—Evan Bush, NBC News, 22 Nov. 2024
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Word History
First Known Use
1874, in the meaning defined above
Dictionary Entries Near brain stem
Cite this Entry
“Brain stem.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/brain%20stem. Accessed 21 Jan. 2025.
Kids Definition
brain stem
noun
: the back and lower part of the brain including the midbrain and medulla oblongata
Medical Definition
brain stem
noun
: the part of the brain composed of the midbrain, pons, and medulla oblongata and connecting the spinal cord with the forebrain and cerebrum
More from Merriam-Webster on brain stem
Britannica.com: Encyclopedia article about brain stem
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