plural medullas or medullae
mə-ˈdə-(ˌ)lē 
-ˌlī
1
2
a
: the inner or deep part of an animal or plant structure
the adrenal medulla
b
Examples of medulla in a Sentence
Recent Examples on the Web
What Is High Porosity Hair? Your hair consists of a cuticle, cortex, and medulla, all of which help protect your hair from damage and retain moisture.
—
Sherri Gordon, Health, 4 June 2025
The flavors feature smoky persimmon, red cherry, and medulla dates.
—Joseph V Micallef, Forbes, 21 Dec. 2024
The naloxone rushed through his capillaries, passed again through vessel walls and spilled into the medulla.
—Blake Nelson, The Mercury News, 13 Oct. 2024
The vagus nerve originates from four clusters of neurons in the brain’s medulla, where the brainstem attaches to the spinal cord.
—R Douglas Fields, WIRED, 29 Sep. 2024
It is produced in the adrenal glands in the adrenal medulla.
—Michelle Pugle, Verywell Health, 13 Aug. 2024
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Sherri Gordon, Health, 4 June 2025
The flavors feature smoky persimmon, red cherry, and medulla dates.
—Joseph V Micallef, Forbes, 21 Dec. 2024
The naloxone rushed through his capillaries, passed again through vessel walls and spilled into the medulla.
—Blake Nelson, The Mercury News, 13 Oct. 2024
The vagus nerve originates from four clusters of neurons in the brain’s medulla, where the brainstem attaches to the spinal cord.
—R Douglas Fields, WIRED, 29 Sep. 2024
It is produced in the adrenal glands in the adrenal medulla.
—Michelle Pugle, Verywell Health, 13 Aug. 2024
Cite this Entry
“Medulla.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/medulla. Accessed 3 Nov. 2025.
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Medical Definition
1
2
a
: the inner or deep part of an organ or structure
the adrenal medulla
b
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