also: ユーロピウム
noun
europium (Eu)
Chemical element with atomic number 63; a rare-earth metal used in phosphors and nuclear control rods.
ユウロピウムは蛍光灯の赤色蛍光体に使われる。
Europium is used in the red phosphor of fluorescent lamps.
Standard katakana spelling for the element europium.
Alternate katakana spelling with long vowel mark; less common but still encountered.
From English 'europium', named after the continent Europe.