Definitions of brain

  1. hit on the head Scrapingweb Dictionary DB
  2. that part of the central nervous system that includes all the higher nervous centers; enclosed within the skull; continuous with the spinal cord Scrapingweb Dictionary DB
  3. that which is responsible for one's thoughts and feelings; the seat of the faculty of reason; "his mind wandered"; "I couldn't get his words out of my head" Scrapingweb Dictionary DB
  4. mental ability; "he's got plenty of brains but no common sense" Scrapingweb Dictionary DB
  5. the brain of certain animals used as meat Scrapingweb Dictionary DB
  6. kill by smashing someone's skull Scrapingweb Dictionary DB
  7. someone who has exceptional intellectual ability and originality; "Mozart was a child genius"; "he's smart but he's no Einstein" Wordnet Dictionary DB
  8. The whitish mass of soft matter (the center of the nervous system, and the seat of consciousness and volition) which is inclosed in the cartilaginous or bony cranium of vertebrate animals. It is simply the anterior termination of the spinal cord, and is developed from three embryonic vesicles, whose cavities are connected with the central canal of the cord; the cavities of the vesicles become the central cavities, or ventricles, and the walls thicken unequally and become the three segments, the fore-, mid-, and hind-brain. Webster Dictionary DB
  9. The anterior or cephalic ganglion in insects and other invertebrates. Webster Dictionary DB
  10. The organ or seat of intellect; hence, the understanding. Webster Dictionary DB
  11. The affections; fancy; imagination. Webster Dictionary DB
  12. To dash out the brains of; to kill by beating out the brains. Hence, Fig.: To destroy; to put an end to; to defeat. Webster Dictionary DB
  13. To conceive; to understand. Webster Dictionary DB
  14. The part of the central nervous system contained within the cranium, comprising the prosencephalon, mesencephalon, and rhombencephalon. It is derived from the anterior part of the embryonic neural tube. Medical Dictionary DB
  15. The soft whitish mass of nerve tissue occupying the skull, forming the center of the nervous system; the seat of consciousness and will; hence, often in the plural, understanding; power of mind. The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919.
  16. To dash out the brains of. The american dictionary of the english language. By Daniel Lyons. Published 1899.
  17. Cerebrum, the mass of nervous matter within the cranium. A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
  18. The mass of nervous matter contained in the skull: the seat of the intellect and of sensation: the intellect. The american dictionary of the english language. By Daniel Lyons. Published 1899.
  19. The nervous matter in the skull; the intellect. The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894.
  20. To dash out the brains. Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914.
  21. That part of the central nervous system that is within the skull; hence, mind; intellect; often in the plural. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  22. The soft whitish mass enclosed in the skull, which is the centre of the nervous system and the seat of sensation, perception, consciousness, and will; the understanding; fancy; imagination. Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914.
  23. A soft whitish mass inclosed in the skull of man or animals, in which the spinal marrow and all the nerves terminate; the understanding; imagination. Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
  24. To kill by dashing out the brains. Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
  25. The centre of the nervous system; the mass of nervous matter in vertebrates at the anterior end of the spinal cord, lying in the skull; in invertebrates, the supraoesophageal or suprapharyngeal ganglia. A dictionary of scientific terms. By Henderson, I. F.; Henderson, W. D. Published 1920.
  26. [Old English] Centre of nervous system; mass of nervous matter in vertebrates at anterior end of spinal cord, lying in cranium; in invertebrates, supraoesophageal or suprapharyngeal ganglia. na
  27. The organ or seat of intellect; hence, the understanding; as, use your brains. dictgcide_fs
  28. a very intelligent person. dictgcide_fs
  29. the controlling electronic mechanism for a robot, guided missile, computer, or other device exhibiting some degree of self-regulation. dictgcide_fs
  30. To dash out the brains of; to kill by beating out the brains. dictgcide_fs
  31. br[=a]n, n. the term applied to that part of the central nervous system which in vertebrated animals is contained within the cranium or skull, and in the invertebrata, to the nervous ganglia near the head end of the body: the seat of the intellect and of sensation: the intellect.--v.t. to dash out the brains of: (Shak.) to conceive of.--n. BRAIN'-COR'AL, the popular name of certain kinds of coral, so called from their general resemblance to a brain.--p.adj. BRAINED, having brains.--n. BRAIN'-FE'VER, a loose popular term which includes congestion of the brain and its membranes, delirium tremens, and inflammation of the brain substance itself.--adjs. BRAIN'ISH (Shak.), brain-sick, hot-headed, furious; BRAIN'LESS, without brains or understanding: silly.--n. BRAIN'-PAN, the skull.--adj. BRAIN'-SICK, diseased in the understanding, deranged.--adv. BRAIN'SICK'LY (Shak.).--n. BRAIN'-SICK'NESS. [A.S. brægn; Dut. brein, prov. Ger. bregen] gutenberg.org/ebooks/37683
  32. Cerebrum-b. Fag, see Nervous diathesis. Medical Lexicon. A Dictionary of Medical Science
  33. [Latin] That part of the central nervous system contained within the cranial cavity; comprising the cerebrum, cerebellum, pons, and medulla. In the embryo the B. is composed of three vesicles, anterior, middle, and posterior. The anterior vesicle gives off the optic vesicle (which develops into the retina and optic nerve), and then divides into two parts, an anterior (Prosencephalon) and posterior (Thalamencephalon). The Prosencephalon (Fore-brain) forms the cerebral hemispheres (budded off from it as two lateral vesicles, the cavity of which constitutes the lateral ventricles), corpora striata, and olfactory lobes (Rhinencephalon). The floor of the Thalamencephalon or Diencephalon (Interbrain) forms the optic chiasm and infundibulum; its walls the optic thalami; its roof the pineal gland, anterior and posterior commissures, velum interpositum, and chorioid lexus; and its cavity the third ventricle. The floor of the middle vesicle (Mid-brain, Mesencephalon) forms the crus cerebri; its roof the corpora quadrigemina; and its cavity the aqueduct of Sylvius. The posterior vesicle divides into two parts, an anterior (Hindbrain, Metencephalon[Huxley, G. A. S.], Epencephalon), the floor of which develops into the pons and the roof into the cerebellum; and a posterior (After-brain, Myelencephalon, Metencephalon[Wilder]), the floor and sides of which form the medulla, and the cavity the fourth ventricle. The B. is composed of a cortex of gray matter (in the cerebrum and cerebellum) ; a series of central ganglia; radiating and longitudinal fibres connecting the cord with the lower ganglia, and these with each other and the cortex; and transverse or commissural fibres connecting one half of the B. with the other. The cortex of the B. is arranged in convolutions and folia, separated by sulci or fissures. See Cerebrum and Cerebellum. The commissural fibres comprise the corpus callosum, anterior and posterior commissure bridging the third ventricle, and the fornix, all of which connect the two cerebral hemispheres; the middle peduncles of the cerebellum, which in part serve to connect the two cerebellar hemispheres; and decussating fibres in the medulla and pons. The longitudinal fibres and ganglia comprise five systems: (1) The pedal system includes the pyramidal tract starting from the parietal cortex, the anterior cortical fibres from the frontal cortex, the posterior cortical fibres from the temporal and occipital cortex, and the caudate and part of the lenticular nucleus with the fibres descending from them; these fibres all pass through the internal capsule and pes of the crus cerebri into the pons, where all terminate except the pyramidal tract, which passes down to form the anterior pyramids of the medulla, and is continuous with the pyramidal tract or the cord. (2) The tegmental system includes the optic thalamus, with radiating fibres connecting it with the cortex, the longitudinal fibres of the tegmentum of the crus cerebri with the imbedded nuclei (red nucleus, substantia nigra, corpus subthalamicum), the tegmentum of the pons with the locus caeruleus, fibres connecting the tegmentum with the cortex, the superior peduncle of the cerebellum connecting the cerebellum with the tegmentum, the fillet connecting the nucleus gracilis and nucleus cuneatus of the medulla with the tegmentum, the longitudinal posterior bundle of the pons, the brachia of the corpora quadrigemina and the reticular formation of the medulla. (3) The system of central (ventricular) gray matter comprises the gray matter lining the ventricles, including the nuclei of the cranial nerves (adjoining the fourth ventricle) and the tuber cinereum on the floor of the third ventricle. (4) The system of outlying cerebral ganglia comprises the corpora quadrigemina and the external and internal geniculate bodies. (5) The cerebellar system comprises the nuclei of the cerebellum (corpus aeutatum, emboliform nucleus, roof-nucleus, etc.), with the cerebellar tracts (inferior peduncles of the cerebellum or restiforra bodies, connected below with the olivary bodies and nucleus gracilis and cuneatus, and with the cerebellar tract and posterior median and external posterior columns of the cord). The functions of the B. are: The evolution of all intellectual processes and of the emotions (cerebral cortex), the reception and conscious appreciation of sensations (nerve-nuclei, corpora quadrigemina, tegmental system, occipital and temporo-sphenoidal cortex), the initiation of voluntary motions, including speech (parieto-frontal cortex. or motor area, in connection with pyramidal tract), production and regulation of body-heat (caudate nucleus, tuber cinereum), regulation of vaso-motor action (tuber cinereum, medulla), maintenance of respiration (medulla), inhibition of heart’s action (medulla), initiation and maintenance of the acts of deglutition and vomiting (medulla), acceleration and inhibition of various visceral operations (cerebral cortex), co-ordination of complicated movements (cerebellum). Weight of b., 50 oz. avoird. (male), 44 oz. (female) ; ranging between 30 and 64 oz. In structure it is composed of gray matter (cortex, ganglia, lining of ventricles) consisting of nerve-cells with connecting fibres; and of white matter (longitudinal and commissural fibres) consisting of medullated nerve-fibres. The nerve-cells receive, store up, and manufacture, and the nerve-fibres transmit, nervous energy and impulses. The B. is covered by its membranes or meninges, comprising the pia mater, which covers it closely, the serous membrane (arachnoid), and the external fibrous membrane or dura mater. The arachnoid bridges over the large fissures of the b., leaving spaces (subarachnoid spaces) filled with cerehro-spinal fluid. The ventricles of the b., which are continuous with each other, with the central canal of the cord, and with the subarachnoid spaces, are lined with a layer of glial cells (ependyma) and are filled with cerebro-spinal fluid. Railway b., see Railway. na
  34. Convoluted nervous substance in skull of vertebrates (sing. of the whole as an organ, pl. of the substance; blow out one\'s bb., shoot him in the head); centre of sensation, thought, &c. (usu. pl., sing. with dignified or exalted effect; cudgel &c. one\'s bb., think hard; have something on the b., be crazy about it; turn one\'s b., make him vain& silly); intellectual power (suck, pick, one\'s b., extract& use his ideas); b.-fag, nervous exhaustion; b.-fever, inflammation of the b.; b.-pan, skull; b.-sick, mad; hence brainless a. (Vb) dash out bb. of. [old English] Concise Oxford Dictionary
  35. The nervous mass within the skull. American pocket medical dictionary.
  36. The encephalon; all that part of the central nervous system which is contained within the skull, comprising the cerebrum and the cerebellum, the pons Varolii, and the medulla oblongata. See cerebrum and cerebellum Appleton's medical dictionary.
  37. bladders. The cerebral vesicles Appleton's medical dictionary.
  38. n. [Anglo-Saxon] The whitish soft mass which occupies the upper cavity of the skull, considered to be the centre of sensation and perception;—the understanding;—the anterior ganglion in insects and other invertebrates. Cabinet Dictionary
  39. That collection of vessels and organs in the head, from which sense and motion arise; the understanding. Complete Dictionary

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