from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The most anterior of the three primary regions of the embryonic brain from which the telencephalon and diencephalon develop.
  • n. The segment of the adult brain that develops from the embryonic forebrain and includes the cerebrum, thalamus, and hypothalamus.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The anterior part of the brain, including the cerebrum, thalamus, and hypothalamus.

from the GNU version of the Collaborative International Dictionary of English

  • n. The anterior of the three principal divisions of the brain, including the prosencephalon and thalamencephalon. Sometimes restricted to the prosencephalon only. See brain.

from The Century Dictionary and Cyclopedia

  • n. The foremost cerebral segment; the prosencephalon; hence, loosely, some anterior division of the brain. See cut under encephalon.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the anterior portion of the brain; the part of the brain that develops from the anterior part of the neural tube


Sorry, no etymologies found.


  • In reading, one's forebrain is fully engaged; when it disengages, reading stops.

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  • New research finds that nitric oxide accumulation in the brain's basal forebrain is both necessary and sufficient to produce sleep, providing a completely new basis for developing drugs that help people stay awake -- or, conversely, sleep.

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  • "It seems that now, finally, recognition has arrived at Werner Herzog's feet, and for an inveterate, lifelong Herzogian (alright, since adolescence), his current presence in the cultural forebrain is something of a vindication."

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  • Robertson RT, Gallardo KA, Claytor KJ, Ha DH, Ku KH, et al. (1998) Neonatal treatment with 192 IgG-saporin produces long-term forebrain cholinergic deficits and reduces dendritic branching and spine density of neocortical pyramidal neurons.

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  • The forebrain, which is normally divided such that we have a left and a right brain—the left and right cerebral hemispheres—is fused into a single unitary structure.

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  • From the lower portion of the most forward portion of the forebrain are a pair of outgrowths which received the nerves from the nostrils and are therefore concerned with the sense of smell.

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  • The cerebrum is part of the forebrain, which is also made up of the diencephalon.

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  • All this may therefore be referred to as the prosencephalon {pros'en-sef'uh-lon; "forebrain" G).

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  • He reports Carr, three beers into an evening, as experiencing "a pleasant foaminess somewhere around his forebrain" and says Carr's melancholy relationships with women have "the feel of a beach in midwinter."

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  • "Shopping, orgasm, learning, highly calorific foods, gambling, prayer," he says, "they all evoke neural signals that converge on a small group of interconnected brain areas called the medial forebrain pleasure circuit."

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