/ Dictionary / Index P posttranscriptional: Meaning and Definition of Find definitions for: post•tran•scrip•tion•al Pronunciation: (pōst"tran-skrip'shu-nl), [key] — n. occurring after the formation of RNA from DNA but before the RNA strand leaves the nucleus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. posttonic posttranslational Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language