/ Dictionary / Index P pyramidion: Meaning and Definition of Find definitions for: pyr•a•mid•i•on Pronunciation: (pir"u-mid'ē-un, -on"), [key] — pl. -mid•i•a a miniature pyramid, as at the apex of an obelisk. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pyramidical pyramid letter Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language