Related Content
- Daily Word Quiz: panglossian
- Analogy of the Day: Today’s Analogy
- Frequently Misspelled Words
- Frequently Mispronounced Words
- Easily Confused Words
- Writing & Language
Noun
- 1. rubidium, Rb, atomic number 37, metallic element, metal
- usage: a soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite
All rights reserved.
Definition and meaning of rb (Dictionary)