- rubella virus
- rubellite
- Ruben Nikolaevich Simonov
- Rubens
- rubescensin
- Rubicon
- rubidium
- rubidium clock
- rubidium gas cell
- rubidium maser
- rubidium metallurgy
- rubidium optical pumping magnetometer
- rubidium ore resources
- rubidium-strontium dating
- rubidium-vapor frequency standard
- Rubin
- Rubina Dina Ilyinichna
- Rubin-Ford effect
- Rubinsteinian school
- rubisco
- RuBP
- rubrene
- rubriblast
- rubrospinal tract
- Rubtsov Nikolay Mikhaylovich