/ Dictionary / Index G germline insertion: Meaning and Definition of Find definitions for: germ'line inser"tion Pronunciation: (jûrm'līn"), [key] — Biotech. Biotech. the insertion of cloned genes into the egg or sperm cell of an organism, using a gene transfer technique, in order to perpetuate a desired trait in its descendants, as pest-resistance in a crop plant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. germ layer germ plasm Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language