‖ mesencephalon Anat.
(mɛsɛnˈsɛfəlɒn)
[mod.L., f. Gr. µέσ-ος middle + ἐγκέϕαλον encephalon.]
The mid-brain.
| 1846 Owen Vertebr. Anim. II. 177 The next succeeding primary division of the brain, is called the ‘mesencephalon’. 1875 Huxley in Encycl. Brit. I. 767/1 The mesencephalon is divided above..into two optic lobes. |