- Aves (Burung)
- Back cross (persilangan balik)
- Badan Tiedman
- Badan Golgi
- Badan kutub (polar body)
- Baeosit
- Bakteri (bacterium)
- Bakteriofage
- Basidiokarp
- Basidiospora (Spora basidium)
- Basidium
- Basil (bacillus)
- Bastar
- Batial
- Batuk (Cough)
- Beri – beri
- Berumah Dua
- Bibit Unggul
- Bilateral Simetris
- Bilateral symmetry