Meaning of posttranscriptional

post•tran•scrip•tion•al

Pronunciation: (pōst"tran-skrip'shu-nl), [key]
— n.
  1. 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.