硝化菌属：硝化菌科，假单胞菌亚目，假单胞菌目的一属，为杆状菌，能将亚硝酸盐氧化为硝酸盐。有两个种，即N. agilis和N. winogradskyi- Haplosporangium
- Haplosporidium
- Hapsburg jaw,lip
- hapten
- haptene
- beta-hydroxybutyric acid
- beta-hypophamine
- betaine
- beta-ketobutyric acid
- beta-lactose
- Betalin
- beta-lipoprotein
- beta-lysin
- betamethasone
- betamicin sulfate
- betanaphthol
- beta-naphtholsulfonic acid
- betanaphthyl
- betanin
- beta-oxybutyria
- beta-oxybutyric acid
- Betapar
- Betapen-VK
- Betaprone
- betapropiolactone