All base metal synonyms
base met·al
B b noun base metal
- noble metal — any of a number of metals, as gold, silver, mercury, or platinum, that resist oxidation when heated in air, and solution by inorganic acids.
- oxide — a compound in which oxygen is bonded to one or more electropositive atoms.
- precious metal — a metal of the gold, silver, or platinum group.
- rare earth — the oxide of any of the rare-earth elements contained in various minerals.
- rare-earth metal — any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons.