atomic number 39
Also found in: Thesaurus.
Switch to new thesaurus
|Noun||1.||atomic number 39 - a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys|
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.
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
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.