Uranium

[jʊ'reɪnɪəm] or [jʊ'renɪəm]

解释:

(noun.) a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons.

编辑:罗比--From WordNet

解释:

(n.) An element of the chromium group, found in certain rare minerals, as pitchblende, uranite, etc., and reduced as a heavy, hard, nickel-white metal which is quite permanent. Its yellow oxide is used to impart to glass a delicate greenish-yellow tint which is accompanied by a strong fluorescence, and its black oxide is used as a pigment in porcelain painting. Symbol U. Atomic weight 239.

整理:朱莉安娜

解释:

n. a very hard but moderately malleable metal resembling nickel or iron in its lustre and colour but in a finely comminuted state occurring as a black powder.—adj. Urā′nic.

校对:雷明顿