MEDULLA

medulla

(noun) the inner part of an organ or structure in plant or animal

myelin, myeline, medulla

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

Source: WordNet® 3.1


Etymology

Noun

medulla (plural medullas or medullae or medullæ)

The soft inner part of something, especially the pith of a fruit.

(anatomy) The inner substance of various organs and structures, especially the marrow of bones.

(anatomy) The medulla oblongata.

(botany) The internal tissue of a plant.

Source: Wiktionary


Me*dul"la, n. Etym: [L.]

1. Marrow; pith; hence, essence. [Obs.] Milton.

2. (Anat.)

Definition: 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.

3. (Bot.)

Definition: A soft tissue, occupying the center of the stem or branch of a plant; pith. Medulla oblongata. Etym: [L., oblong medulla] (Anat.), 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.

Source: Webster’s Unabridged Dictionary 1913 Edition



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Word of the Day

24 April 2025

LININ

(noun) an obsolete term for the network of viscous material in the cell nucleus on which the chromatin granules were thought to be suspended


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