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medulla

DEFINITIONS OF: medulla

1

n the inner part of an organ or structure in plant or animal

Antonyms:
cortex
the tissue forming the outer layer of an organ or structure in plant or animal
Types:
adrenal medulla
the medulla of the adrenal gland; secretes epinephrine
Type of:
animal tissue
the tissue in the bodies of animals
plant tissue
the tissue of a plant

n a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers

Synonyms:
myelin, myeline
Type of:
fat
a soft greasy substance occurring in organic tissue and consisting of a mixture of lipids (mostly triglycerides)

n 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”
Synonyms:
bulb, medulla oblongata
Type of:
neural structure
a structure that is part of the nervous system
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