English definition of Brain

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Definition of brain

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Brain (n.) 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 seg

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Hydrocephalus :: Hydrocephalus (n.) An accumulation of liquid within the cavity of the cranium, especially within the ventricles of the brain; dropsy of the brain. It is due usually to tubercular meningitis. When it occurs in infancy, it often enlarges the head enormously..

Cerebroscopy :: Cerebroscopy (n.) Examination of the brain for the diagnosis of disease; esp., the act or process of diagnosticating the condition of the brain by examination of the interior of the eye (as with an ophthalmoscope)..

Pulvinar :: Pulvinar (n.) A prominence on the posterior part of the thalamus of the human brain.

Shatter-brained :: Shatter-brained (a.) Alt. of Shatter-pate.

Optocoelia :: Optocoelia (n.) The cavity of one of the optic lobes of the brain in many animals.

Genu :: Genu (n.) The kneelike bend, in the anterior part of the callosum of the brain..

Hot-brained :: Hot-brained (a.) Ardent in temper; violent; rash; impetuous; as, hot-brained youth..

Pan :: Pan (n.) The skull, considered as a vessel containing the brain; the upper part of the head; the brainpan; the cranium..

Head :: Head (n.) The seat of the intellect; the brain; the understanding; the mental faculties; as, a good head, that is, a good mind; it never entered his head, it did not occur to him; of his own head, of his own thought or will..

Gyrus :: Gyrus (n.) A convoluted ridge between grooves; a convolution; as, the gyri of the brain; the gyri of brain coral. See Brain..

Arachnoid :: Arachnoid (a.) Pertaining to a thin membrane of the brain and spinal cord, between the dura mater and pia mater..

Pyla :: Pyla (n.) The passage between the iter and optocoele in the brain.

Encephalon :: Encephalon (n.) The contents of the cranium; the brain.

Falx :: Falx (n.) A curved fold or process of the dura mater or the peritoneum; esp., one of the partitionlike folds of the dura mater which extend into the great fissures of the brain..

Sympathy :: Sympathy (n.) The reciprocal influence exercised by the various organs or parts of the body on one another, as manifested in the transmission of a disease by unknown means from one organ to another quite remote, or in the influence exerted by a diseased condition of one part on another part or organ, as in the vomiting produced by a tumor of the brain..

Choroid :: Choroid (a.) resembling the chorion; as, the choroid plexuses of the ventricles of the brain, and the choroid coat of the eyeball..

Fillet :: Fillet (n.) A fascia; a band of fibers; applied esp. to certain bands of white matter in the brain.

Iter :: Iter (n.) A passage; esp., the passage between the third and fourth ventricles in the brain; the aqueduct of Sylvius..

Ligule :: Ligule (n.) A band of white matter in the wall of fourth ventricle of the brain.

Leptocardia :: Leptocardia (n. pl.) The lowest class of Vertebrata, including only the Amphioxus. The heart is represented only by a simple pulsating vessel. The blood is colorless; the brain, renal organs, and limbs are wanting, and the backbone is represented only by a simple, unsegmented notochord. See Amphioxus..