Definitions
Silvery element used in phosphors, ceramics, and alloys.
Word origin
From Ytterby + -ium, named after Ytterby, Sweden, the same etymological source as terbium, erbium, and ytterbium.
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Phosphor element”7 letters
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