/ Dictionary / Index R rhinencephalon: Meaning and Definition of Find definitions for: rhi•nen•ceph•a•lon Pronunciation: (rī"nen-sef'u-lon", -lun), [key] — pl. -lons, -la the part of the cerebrum containing the olfactory structures. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rhinencephalon (Thesaurus) Rhineland-Palatinate Rhine Palatinate Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language