Forebrain

ahd-5
  • noun. The most anterior of the three primary regions of the embryonic brain from which the telencephalon and diencephalon develop.
  • noun. The segment of the adult brain that develops from the embryonic forebrain and includes the cerebrum, thalamus, and hypothalamus.
  • The Century Dictionary and Cyclopedia
  • noun. The foremost cerebral segment; the prosencephalon; hence, loosely, some anterior division of the brain. See cut under encephalon.
  • the GNU version of the Collaborative International Dictionary of English
  • noun. The anterior of the three principal divisions of the brain, including the prosencephalon and thalamencephalon. Sometimes restricted to the prosencephalon only. See brain.
  • Wiktionary, Creative Commons Attribution/Share-Alike License
  • noun. The anterior part of the brain, including the cerebrum, thalamus, and hypothalamus.
  • WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
  • noun. the anterior portion of the brain; the part of the brain that develops from the anterior part of the neural tube
  • Word Usage
    "In reading, one's forebrain is fully engaged; when it disengages, reading stops."
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    brain