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brain
1 a: the portion of the vertebrate central nervous system enclosed in the skull and continuous with the spinal cord through the foramen magnum that is composed of neurons and supporting and nutritive structures (as glia) and that integrates sensory information from inside and outside the body in controlling autonomic function (as heartbeat and respiration), in coordinating and directing correlated motor responses, and in the process of learning
— compare forebrain
, hindbrain
, midbrain b: a nervous center in invertebrates comparable in position and function to the vertebrate brain2 a
(1): intellect
, mind <has a clever brain>
(2): intellectual endowment : intelligence —often used in plural <plenty of brains in that family> b
(1): a very intelligent or intellectual person
(2): the chief planner within a group —usually used in plural <she's the brains behind their success>3: something that performs the functions of a brain
; especially : an automatic device (as a computer) for control or computation
Learn more about
"brain" and related topics at
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