K5Print Free printable worksheets for K–5

rubidium

  • noun
  • ro͞obĭd'ēəm

The chemical element (symbol Rb) with an atomic number of 37. It is a soft, highly reactive alkali metal.

Other meanings

  1. A single atom of this element.

A kind of

  • metallic element

Related words

  • trirubidium
  • dirubidium
  • monorubidium
  • organorubidium
  • radiorubidium
  • rubidide
  • rubidium auride
  • rubidium chloride
  • rubidium hydroxide
  • rubidium nitrate
  • rubidium oxide
  • rubidium-strontium

Word history

From Latin "rūbidus" (red).

Where this comes from

This definition is adapted from “rubidium” on Wiktionary, by its contributors; related-word lists use Open English WordNet (CC BY 4.0, based on Princeton WordNet), published under CC BY-SA 4.0. This page is published under the same licence.