Eu and Metallic element

Eu noun - A bivalent and trivalent metallic element of the rare earth group.

Metallic element and Eu are semantically related. In some cases you can use "Metallic element" instead a noun "Eu".

Metallic element noun - Any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc..

Eu and metallic element are semantically related. Sometimes you can replace term "Eu" with "Metallic element", this terms are similar.