Beryllium and Metallic element

Beryllium noun - A light strong brittle grey toxic bivalent metallic element.

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

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..

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