(chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight | synthetic narcotic drug similar to morphine but less habit-forming; used in narcotic detoxification and maintenance of heroin addiction |
| someone who intervenes with authorities for a person in trouble (usually using underhand or illegal methods for a fee) |
| a skilled worker who mends or repairs things |
| a chemical compound that sets or fixes something (as a dye or a photographic image) |