Wiktionary(5.00 / 1 vote)Rate this definition: 1  deflection(Noun) The act of deflecting or something deflected. 2  deflection(Noun) The deviation of a needle or other indicator from its previous position.
1 Codeine use can be habit-forming even in regular doses. 2  Morphine is the most abundant opiate derived from the opium plant. 3  With hundreds of brand names, morphine is an analgesic drug that acts directly on the central nervous system.
Morphine is one of the oldest and most common narcotic pain medications. It can be administered orally and by injection. It is a naturally occurring substance extracted directly from the opium poppy plant.