9781422282519

WORDS TO UNDERSTAND

analgesic: pain-relieving substance. apothecaries: drug stores. endorphin: a natural painkiller in the body that attaches to the same cell receptors that morphine does. hypodermic: a thin hollow needle used to inject substances under the skin. laudanum: a solution of opium and alcohol once used to relieve pain. synthesize: to chemically produce one substance from another. synthetic: something that was produced artificially rather than derived from a natural substance. tuberculosis: an infectious disease of the lungs.