- 1The inner region of an organ or tissue, especially when it is distinct from the outer region or cortex (as in a kidney, an adrenal gland, or hair): the adrenal medulla produces adrenalineMore example sentences
- The adrenal cortex is of mesodermal origin, whereas the adrenal medulla is derived from the neural crest.
- The biopsy specimen consisted of renal cortex and outer medulla and contained 17 glomeruli.
- The nodules did not invade the adrenal capsule or adrenal medulla.
- 1.1 short for medulla oblongata.More example sentences
- The brainstem consists of the midbrain, pons and medulla, structures located deep in the back of the brain.
- Similar changes may be seen in the medulla and upper brain stem.
- Removal of the meninges and some cranial nerve roots allow salient features of the ventral or anterior aspect of the medulla and pons to be examined more easily.
- 1.2 [mass noun] Botany The soft internal tissue or pith of a plant: the main bulk of the potato tuber is pith or medullaMore example sentences
- Chloroplasts were abundant in the secondary cortex and secondary phloem, and occurred throughout the secondary xylem rays and medulla of 3-year-old stems.
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- Radiologic examination in all cases except one revealed a well-circumscribed mass in the hilar and medullary region of the kidney.
- On the right is seen the large, medullary area of the cerebral hemisphere, surrounded by a layer of gray cortical matter.
- In all reported cases of renal medullary carcinoma in which the race was known, the patients have been black.
late Middle English (in the sense 'bone marrow'): from Latin, 'pith or marrow'.
More definitions of medullaDefinition of medulla in:
- The US English dictionary