1. (noun) myelin, myeline, medulla
a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers
Synonyms: medulla oblongata, medulla, myeline, bulb, myelin
Antonyms: cortex
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)
Synonyms: lightbulb, electric light, light bulb, medulla, incandescent lamp, myeline, electric-light bulb, medulla oblongata, bulb, myelin
Antonyms: cortex
3. (noun) medulla
the inner part of an organ or structure in plant or animal
Synonyms: medulla oblongata, myeline, bulb, myelin
Antonyms: cortex
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Synonyms and Antonyms of medulla 
