Medulla
WordNet
noun
(1) The inner part of an organ or structure in plant or animal
(2) 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) A white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers
WiktionaryText
Noun
- The soft inner part of something, especially the pith of a fruit.
- The inner substance of various organs and structures, especially the marrow of bones.
- The medulla oblongata.
- The internal tissue of a plant.
Noun
medullā