小孢子目：一目寄生性原虫，属于微孢子门(Microspora)微孢子纲(Microsporea)，其附属孢子细胞器发育最差而最大限度地发育孢子囊，孢子缺乏发育良好的极原始细胞(polaroplast)，极管较短，几乎无内生孢子- Broxolin
- B.R.S.
- brucella
- Brucella
- Brucellaceae
- brucellar
- Brucellergen
- brucelliasis
- brucellin
- brucellosis
- Bruce's septicemia
- Bruce's tract
- Bruch's glands,membrane(layer)
- brucine
- Bruck's disease
- Bruck's reaction,test
- Brudzinski's sign(reflex)
- Brugia
- bruise
- bruissement
- bruit
- Brunner's glands
- Brunn's membrane,epithelial nests
- brunonianism
- Brunschwig's operation