English noun: medulla | |||
1. | medulla (substance) a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers | ||
Synonyms | myelin, myeline | ||
Broader (hypernym) | fat | ||
Substance meronym | medullary sheath, myelin sheath | ||
2. | medulla (body) lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata) | ||
Samples | The medulla oblongata is the most vital part of the brain because it contains centers controlling breathing and heart functioning. | ||
Synonyms | bulb, medulla oblongata | ||
Broader (hypernym) | neural structure | ||
Part holonym | respiratory center | ||
Part meronym | brain stem, brain-stem, brainstem | ||
3. | medulla (body) the inner part of an organ or structure in plant or animal | ||
Broader (hypernym) | animal tissue, plant tissue | ||
Narrower (hyponym) | adrenal medulla | ||
Antonyms | cortex | ||