01 n. Marrow; pith; hence, essence.
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1.
Marrow; pith; hence, essence.[Obs.]
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2.
The marrow of bones; the deep or inner portion of an organ or part; as, the medulla, or medullary substance, of the kidney; specifically, the medula oblongata.(Anat.)
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3.
A soft tissue, occupying the center of the stem or branch of a plant; pith.(Bot.)
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4.
See medulla oblongata.
Phrases & compounds
Medulla oblongata —
the posterior part of the brain connected with the spinal cord. It includes all the hindbrain except the cerebellum and pons, and from it a large part of the cranial nerves arise. It controls very largely respiration, circulation, swallowing, and other functions, and is the most vital part of the brain; -- called also bulb of the spinal cord. See Brain.