/ Dictionary / Index P penecontemporaneous: Meaning and Definition of Find definitions for: pe•ne•con•tem•po•ra•ne•ous Pronunciation: (pē"nē-kun-tem"pu-rā'nē-us), [key] — adj. Geol. formed during or shortly after the formation of the containing rock stratum: penecontemporaneous minerals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pene- Peneios Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language