a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium
中英词源
neptunium 镎
金属元素，来自Neptune,海王星，以与金属元素uranium相对应。
neptunium (n.)
1941, from Neptune + element ending -ium. Named for its relative position in the periodic table, next after Uranium, as the planet Neptune is one beyond Uranus. See also plutonium.
词态变化
权威造句
1. The adsorption isotherm of neptunium on silica gel corresponds to the form of Langmuir isotherm.
