Relating to the mesencephalon.
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mes·en·ce·phal·ic -.en(t)-sə-'fal-ik adj of or relating to the midbrain <the \mesencephalic nucleus of the trigeminal nerve>
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mes·en·ce·phal·ic (mez-en″sə-falґik) pertaining to the mesencephalon.Medical dictionary. 2011.