/ Dictionary / Index M metencephalon: Meaning and Definition of Find definitions for: met•en•ceph•a•lon Pronunciation: (met"en-sef'u-lon"), [key] — pl. -lons, -la the anterior section of the hindbrain, comprising the cerebellum and pons. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: metencephalon (Thesaurus) metempsychosis Met enkephalin Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language