Most Americans say, He will live! After all, the thumbs-up sign is a positive thing. It's how we encourage our friends and silently show approval. But to the ancient Romans, a thumbs up mimicked the upward thrust of a sword through the heart. It meant, kill. A thumbs-down meant put your sword down. So where did this confusion about thumbs come from?
Freebase(0.00 / 0 votes)Rate this definition: Transfection. Transfection is the process of deliberately introducing nucleic acids into cells. The term is used notably for non-viral methods in eukaryotic cells.
WordReference Random House Unabridged Dictionary of American English Â© 2017. transâ¢derâ¢mal (trans dÃ»râ²mÉl, tranz-),USA pronunciation adj. MedicineAlso, transâ¢derâ²mic. transcutaneous. Drugs[Pharm.](of a medication) applied to the skin, usually as part of an adhesive patch, for absorption into the bloodstream.