| hazardous waste (hāz'ər-dəs) Pronunciation Key
A used or discarded material that can damage the environment and be harmful to health. Hazardous wastes include heavy metals and toxic chemicals used in industrial products and processes as well as infectious medical wastes and radioactive materials such as spent nuclear fuel rods. |
| a chattering or flighty, light-headed person. |
| a gadget; dingus; thingumbob. |