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1. (n.) medulla
the marrow of the bones.
2. medulla
the soft marrowlike center of an organ, as the kidney or adrenal gland.
3. medulla
the pith of plants.
Etymology: (1635–45; < L: marrow, pith)
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| Definition of 'medulla' |
Princeton's WordNet |
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1. (noun) myelin, myeline, medulla
a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers
2. (noun) medulla oblongata, medulla, bulb
lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata)
"the medulla oblongata is the most vital part of the brain because it contains centers controlling breathing and heart functioning"
3. (noun) medulla
the inner part of an organ or structure in plant or animal
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| Definition of 'medulla' |
Webster Dictionary |
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1. (noun) medulla
marrow; pith; hence, essence
2. (noun) medulla
the marrow of bones; the deep or inner portion of an organ or part; as, the medulla, or medullary substance, of the kidney; specifically, the medula oblongata
3. (noun) medulla
a soft tissue, occupying the center of the stem or branch of a plant; pith
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Definitions of medulla 
