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English to English noun
| 1 |
a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers |  | source: wordnet30
| 2 |
lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata) | | Example: the medulla oblongata is the most vital part of the brain because it contains centers controlling breathing and heart functioning
source: wordnet30
| 3 |
the inner part of an organ or structure in plant or animal | | source: wordnet30
| 4 |
Marrow; pith; hence, essence. | | source: webster1913
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