Medulla

Webster's Dictionary of the English Language

·noun Marrow; pith; hence, essence.

II. Medulla ·noun A soft tissue, occupying the center of the stem or branch of a plant; pith.

III. Medulla ·noun 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.

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