Meaning of MEDULLA
| Pronunciation: | | mi'dulu
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 WordNet Dictionary |
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- [n] the inner part of an organ or structure in plant or animal
- [n] 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"
- [n] a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers
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| | Synonyms: | | bulb, medulla oblongata, myelin, myeline |
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| | Antonyms: | | cortex | | |
| | See Also: | | adrenal medulla, animal tissue, fat, hindbrain, medullary sheath, myelin sheath, neural structure, plant tissue, respiratory center, rhombencephalon | |
| Webster's 1913 Dictionary |
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| | Definition: | | \Me*dul"la\, n. [L.]
1. Marrow; pith; hence, essence. [Obs.] --Milton.
2. (Anat.) 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. (Bot.) A soft tissue, occupying the center of the stem or
branch of a plant; pith.
{Medulla oblongata}. [L., oblong medulla] (Anat.), 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}.
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| Medical Dictionary |
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| | Definition: | | Central area of an organ, gland or bone. |
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