spinal cord
 脊髓


 spinal cord 名詞
 脊髓,脊索


 Nerv·ous a.
 1. Possessing nerve; sinewy; strong; vigorous. “Nervous arms.”
 2. Possessing or manifesting vigor of mind; characterized by strength in sentiment or style; forcible; spirited; as, a nervous writer.
 3. Of or pertaining to the nerves; seated in the nerves; as, nervous excitement; a nervous fever.
 4. Having the nerves weak, diseased, or easily excited; subject to, or suffering from, undue excitement of the nerves; easily agitated or annoyed.
    Poor, weak, nervous creatures.   --Cheyne.
 5. Sensitive; excitable; timid.
    Our aristocratic class does not firmly protest against the unfair treatment of Irish Catholics, because it is nervous about the land.   --M. Arnold.
 Nervous fever Med., a low form of fever characterized by great disturbance of the nervous system, as evinced by delirium, or stupor, disordered sensibility, etc.
 Nervous system Anat., the specialized coordinating apparatus which endows animals with sensation and volition. In vertebrates it is often divided into three systems: the central, brain and spinal cord; the peripheral, cranial and spinal nerves; and the sympathetic. See Brain, Nerve, Spinal cord, under Spinal, and Sympathetic system, under Sympathetic, and Illust. in Appendix.
 Nervous temperament, a condition of body characterized by a general predominance of mental manifestations.

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 Mar·row n.
 1. Anat. The tissue which fills the cavities of most bones; the medulla.  In the larger cavities it is commonly very fatty, but in the smaller cavities it is much less fatty, and red or reddish in color.
 2. The essence; the best part.
 It takes from our achievements . . .
 The pith and marrow of our attribute.   --Shak.
 3.  One of a pair; a match; a companion; an intimate associate. [Scot.]
 Chopping and changing I can not commend,
 With thief or his marrow, for fear of ill end.   --Tusser.
 Marrow squash Bot., a name given to several varieties of squash, esp. to the Boston marrow, an ovoid fruit, pointed at both ends, and with reddish yellow flesh, and to the vegetable marrow, a variety of an ovoid form, and having a soft texture and fine grain resembling marrow.
 Spinal marrow. Anat. See Spinal cord, under Spinal.


 Spi·nal a.
 1. Anat. Of, pertaining to, or in the region of, the backbone, or vertebral column; rachidian; vertebral.
 2. Of or pertaining to a spine or spines.
 Spinal accessory nerves, the eleventh pair of cranial nerves in the higher vertebrates. They originate from the spinal cord and pass forward into the skull, from which they emerge in company with the pneumogastrics.
 Spinal column, the backbone, or connected series or vertebrae which forms the axis of the vertebrate skeleton; the spine; rachis; vertebral column.
 Spinal cord, the great nervous cord extending backward from the brain along the dorsal side of the spinal column of a vertebrate animal, and usually terminating in a threadlike appendage called the filum terminale; the spinal, or vertebral, marrow; the myelon. The nervous tissue consists of nerve fibers and nerve cells, the latter being confined to the so-called gray matter of the central portions of the cord, while the peripheral white matter is composed of nerve fibers only. The center of the cord is traversed by a slender canal connecting with the ventricles of the brain.

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 spinal cord
      n : a major part of the central nervous system which conducts
          sensory and motor nerve impulses to and from the brain; a
          long tube-like structure extending from the base of the
          brain through the vertebral canal to the upper lumbar
          region [syn: medulla spinalis]