(also Y)mass noun
The chemical element of atomic number 39, a greyish-white metal generally included among the rare earth elements.‘Among various radionuclides, yttrium is of particular importance due to its chemical and nuclear characteristics.’
- ‘The elements more abundant in Earth's crust seem to have more mentions - iron and oxygen have far more pages than yttrium and scandium.’
- ‘Edwards notes from chemical analysis that there are traces of yttrium which are undoubtedly of diagenetic origin.’
Early 19th century modern Latin, from Ytterby (see ytterbium).
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