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telencephalon Syllabification: tel·en·ceph·a·lon
Pronunciation: /ˌtelənˈsefəlän/ /-lən/

Definition of telencephalon in English:


The most highly developed and anterior part of the forebrain, consisting chiefly of the cerebral hemispheres. Compare with diencephalon.
Example sentences
  • Repertoire size can be predicted by variance in the sizes of several brain nuclei, which show significant covariation not only with each other but also with the size of the telencephalon or overall brain size.
  • For example, development of the telencephalon can be divided into these stages: neurectoderm, neural plate, neural tube, forebrain vesicle, evaginated hemispheres, etc.
  • Developmentally, estrogens might be synthesized only locally in the telencephalon of male Zebra Finches to masculinize the neural circuits controlling song.


Late 19th century: from tele- 'far' + encephalon.

Definition of telencephalon in:

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