1. Right back (RB) Right back, the abbreviation of the position of the player on the football field.

2. Element symbol English name: rubidium Chinese name: rubidium

3.RB is the trading code of rebar, which is listed on Shanghai Futures Exchange.

4. Retinoblastoma

5.RB index RB index is an international coal price index Rb index launched by Richards Bay Index and South Africa Port Richard Coal Price Index, a GlobalCoal index platform.

6.RB is also often used as an abbreviation for Japan.