English dictionary

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English noun: medulla

1. medulla (substance) a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers

Synonymsmyelin, myeline

Broader (hypernym)fat

Substance meronymmedullary 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)

SamplesThe medulla oblongata is the most vital part of the brain because it contains centers controlling breathing and heart functioning.

Synonymsbulb, medulla oblongata

Broader (hypernym)neural structure

Part holonymrespiratory center

Part meronymbrain 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


Based on WordNet 3.0 copyright © Princeton University.
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