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.
Definition of swab. 1a : mop; especially : a yarn mopb (1) : a wad of absorbent material usually wound around one end of a small stick and used especially for applying medication or for removing material from an area (2) : a specimen taken with a swabc : a sponge or cloth patch attached to a long handle and used to clean the bore of a firearm.