无隔亚目：簇虫亚纲(Gregarinia)真簇虫目(Eugregarinidai)中的寄生性原虫亚目，特征为发生并孢子(syzygy)和配子囊，配子母细胞为单房，有些品种产生锐突，代表属为单房簇虫属(Monocystis)和硒簇虫属(Selenidium)。参见Acephalina- nitrohydrochloric acid
- Nitrol
- nitromannite
- nitromersol
- nitrometer
- nitromethane
- nitromifene citrate
- nitronaphthalene
- nitronaphthalin
- nitrophenol
- nitroprotein
- nitroprusside
- nitrosaccharose
- nitrosalol
- nitrosamine
- nitrosate
- nitrosation
- nitroscanate
- nitrose
- nitrosification
- nitrosifying
- nitroso-
- nitrosobacteria
- nitrosobacterium
- Nitrosococcus