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词汇 medulla
释义

Definition of medulla in English:

medulla

noun mɛˈdʌləməˈdələ
Anatomy
  • 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)

    〔剖〕髓质

    the adrenal medulla produces adrenaline
    Example sentencesExamples
    • Each strand of hair is constructed of three components - the cuticle, cortex and medulla.
    • Melanin pigment, associated with melanocytes, is more typically leptomeningeal based, particularly in the ventral medulla and cervical spinal cord regions.
    • The biopsy specimen consisted of renal cortex and outer medulla and contained 17 glomeruli.
    • The adrenal cortex is of mesodermal origin, whereas the adrenal medulla is derived from the neural crest.
    • The nodules did not invade the adrenal capsule or adrenal medulla.
    1. 1.1
      short for medulla oblongata
      Example sentencesExamples
      • The cerebrum, pons, and medulla were hypoplastic.
      • Similar changes may be seen in the medulla and upper brain stem.
      • The medulla, or brain stem, controls or influences all of the bodily functions that you do not have to think about, like breathing, heart rate, temperature and consciousness.
      • The brainstem consists of the midbrain, pons and medulla, structures located deep in the back of the brain.
      • 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.
    2. 1.2Botany mass noun The soft internal tissue or pith of a plant.
      〔植〕髓,髓部
      the main bulk of the potato tuber is pith or medulla
      Example sentencesExamples
      • Chloroplasts were abundant in the secondary cortex and secondary phloem, and occurred throughout the secondary xylem rays and medulla of 3-year-old stems.

Derivatives

  • medullary

  • adjective mɛˈdʌləri
    Anatomy
    • 1Relating to the inner region of an organ, tissue, or structure.

      renal medullary oxygenation
      1. 1.1 Relating to the continuation of the spinal cord within the skull.
      2. 1.2Botany Relating to the soft internal tissue or pith of a plant.
        〔植〕髓,髓部
      Example sentencesExamples
      • bone marrow in the medullary cavity
      • 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.
      • Radiologic examination in all cases except one revealed a well-circumscribed mass in the hilar and medullary region of the kidney.
      • lateral medullary strokes
      • the medullary sheath is an essential organ in the early age of a shoot

Origin

Late Middle English (in the sense 'bone marrow'): from Latin, 'pith or marrow'.

Rhymes

colour (US color), cruller, culler, mullah, Muller, nullah, sculler, Sulla

Definition of medulla in US English:

medulla

nounməˈdələməˈdələ
Anatomy
  • 1The inner region of an organ or tissue, especially when it is distinguishable from the outer region or cortex (as in a kidney, an adrenal gland, or hair)

    〔剖〕髓质

    the adrenal medulla produces adrenaline
    Example sentencesExamples
    • Each strand of hair is constructed of three components - the cuticle, cortex and medulla.
    • The biopsy specimen consisted of renal cortex and outer medulla and contained 17 glomeruli.
    • The adrenal cortex is of mesodermal origin, whereas the adrenal medulla is derived from the neural crest.
    • The nodules did not invade the adrenal capsule or adrenal medulla.
    • Melanin pigment, associated with melanocytes, is more typically leptomeningeal based, particularly in the ventral medulla and cervical spinal cord regions.
    1. 1.1
      short for medulla oblongata
      Example sentencesExamples
      • 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.
      • The cerebrum, pons, and medulla were hypoplastic.
      • Similar changes may be seen in the medulla and upper brain stem.
      • The medulla, or brain stem, controls or influences all of the bodily functions that you do not have to think about, like breathing, heart rate, temperature and consciousness.
      • The brainstem consists of the midbrain, pons and medulla, structures located deep in the back of the brain.
    2. 1.2Botany The soft internal tissue or pith of a plant.
      〔植〕髓,髓部
      the main bulk of the potato tuber is pith or medulla
      Example sentencesExamples
      • Chloroplasts were abundant in the secondary cortex and secondary phloem, and occurred throughout the secondary xylem rays and medulla of 3-year-old stems.

Origin

Late Middle English (in the sense ‘bone marrow’): from Latin, ‘pith or marrow’.

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