atomic number 39

Noun
  1. is a type of: metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
    substance meronym:
    • fergusonite - a dark mineral consisting of oxides of yttrium and erbium and tantalum and other minerals
    • gadolinite, ytterbite - a mineral that is a source of rare earths; consists of silicates of iron and beryllium and cerium and yttrium and erbium
    • xenotime - a brown-to-yellow mineral that is a phosphate of yttrium in crystalline form
    same as: y, yttrium

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