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.
v. plunÂ·dered, plunÂ·derÂ·ing, plunÂ·ders. v.tr. 1. To rob of goods by force, especially in time of war; pillage: plunder a village. 2. To seize wrongfully or by force; steal: plundered the supplies. v.intr.