| 释义 |
halogen美 ['hælədʒən] 英 ['hælədʒen] 1. | 卤素any of a set of five chemical elements, including fluorine , chlorine and iodine , that react with hydrogen to form acids from which simple salts can be made. Halogens , in the form of gas, are used in lamps and cookers/stoves. |
n. | 1. any of the five electronegative elements, namely fluorine, chlorine, iodine, bromine, or astatine 2. a chemical element belonging to a group of five that combine with metals to form salts | adj. | 1. describes lamps or heat sources that have a filament surrounded by halogen vapor 2. using halogen to produce light or heat |
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