- [uncountable] (symbol Ni)
a chemical element. Nickel is a hard silver-white metal used in making some types of steel and other alloys. 镍 - [countable]
a coin of the US and Canada worth 5 cents （美国和加拿大的）5 分镍币
Word Originmid 18th cent.: shortening of German Kupfernickel, the copper-coloured ore from which nickel was first obtained, from Kupfer ‘copper’ + Nickel ‘demon’ (with reference to the ore's failure to yield copper).