Rb

Symbol, Chemistry.

1. rubidium.

RB-

¹

abbreviation for

1. reconnaissance bomber

   RB-57

Rb

²

the chemical symbol for

1. rubidium

Example Sentences

The figure will be high but we could lend our time and sign a nondisclosure agreement with R.B. fine art.

From The Daily Beast

God grant that, and all else good for you, dear friend, and so for R.B.

From Project Gutenberg