A sedative or tranquilizer (or tranquilliser, see American and British English spelling differences) is a substance that induces sedation by reducing irritability or excitement. At higher doses it may result in slurred speech, staggering gait, poor judgment, and slow, uncertain reflexes.oses of sedatives such as benzodiazepines, when used as a hypnotic to induce sleep, tend to be higher than amounts used to relieve anxiety, whereas only low doses are needed to provide a peaceful effect.
1 Scab, a hard coating on the skin formed during the wound healing reconstruction phase.  scAb, single-chain antibody fragment.
scab. 1  a crust that forms over a sore or wound during healing. 2  a mangy skin disease, as scabies, of animals, esp. sheep. 3  any of various plant diseases characterized by roughened, scablike spots on leaves, stems, or fruits. : 4  usually a term of contempt or derision Slang a low, contemptible fellow; scoundrel.