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.
Apomorphine is a D2-dopamine-receptor agonist and a derivative of the narcotic drug morphine. However, unlike morphine, it is not used in veterinary medicine to alleviate pain.