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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Fissural :: Fissural (a.) Pertaining to a fissure or fissures; as, the fissural pattern of a brain..

Cortex :: Cortex (n.) The outer or superficial part of an organ; as, the cortex or gray exterior substance of the brain..

Interbrain :: Interbrain (n.) See Thalamencephalon.

Braining :: Braining (p. pr. & vb. n.) of Brai.

Addle-brain :: Addle-brain (n.) Alt. of Addle-pat.

Prosencephalon :: Prosencephalon (n.) The anterior segment of the brain, including the cerebrum and olfactory lobes; the forebrain..

Epencephalon :: Epencephalon (n.) The segment of the brain next behind the midbrain, including the cerebellum and pons; the hindbrain. Sometimes abbreviated to epen..

Addle :: Addle (a.) Having lost the power of development, and become rotten, as eggs; putrid. Hence: Unfruitful or confused, as brains; muddled..

Embolism :: Embolism (n.) The occlusion of a blood vessel by an embolus. Embolism in the brain often produces sudden unconsciousness and paralysis.

Crus :: Crus (n.) Often applied, especially in the plural, to parts which are supposed to resemble a pair of legs; as, the crura of the diaphragm, a pair of muscles attached to it; crura cerebri, two bundles of nerve fibers in the base of the brain, connecting the medulla and the forebrain..

Funiculus :: Funiculus (n.) A cord, baud, or bundle of fibers; esp., one of the small bundles of fibers, of which large nerves are made up; applied also to different bands of white matter in the brain and spinal cord..

Phrenomagnetism :: Phrenomagnetism (n.) The power of exciting the organs of the brain by magnetic or mesmeric influence.

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..

Postcommissure :: Postcommissure (n.) A transverse commisure in the posterior part of the roof of the third ventricle of the brain; the posterior cerebral commisure.

Encephaloid :: Encephaloid (a.) Resembling the material of the brain; cerebriform.

Intercavernous :: Intercavernous (a.) Between the cavernous sinuses; as, the intercavernous sinuses connecting the cavernous sinuses at the base of the brain..

Feather-head :: Feather-head (n.) A frivolous or featherbrained person.

Cerebrin :: Cerebrin (n.) A nonphosphorized, nitrogenous substance, obtained from brain and nerve tissue by extraction with boiling alcohol. It is uncertain whether it exists as such in nerve tissue, or is a product of the decomposition of some more complex substance..

Cerebric :: Cerebric (a.) Of, pertaining to, or derived from, the brain..

Praecommissure :: Praecommissure (n.) A transverse commissure in the anterior part of the third ventricle of the brain; the anterior cerebral commissure.