lutetium, lutecium, Lu, atomic number
(noun) a trivalent metallic element of the rare earth group; usually occurs in association with yttrium
Source: WordNet® 3.1
lutetium (uncountable)
A chemical element (symbol Lu) with an atomic number of 71, a silvery-white metal which resists corrosion in dry air.
• cassiopeium (name proposed by Baron Carl Auer von Welsbach, one of the discoverers of lutetium, but rejected)
Source: Wiktionary
22 February 2025
(noun) the use of closed-class words instead of inflections: e.g., ‘the father of the bride’ instead of ‘the bride’s father’
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