ni·tro·bac·te·ri·um 
(nī′trō-băk-tîrē-əm)
(nī′trō-băk-tîrē-əm)n. pl. ni·tro·bac·te·ri·a (-tîrē-ə)
A nitrifying bacterium.
- semiprecious stone
- semiprivate
- semipro
- semiprofessional
- semiprofessionally
- semipublic
- semipublicly
- semiquaver
- semiretired
- semiretirement
- semirigid
- semiround
- semirural
- semiskilled
- semisoft
- semisolid
- semispherical
- semisub
- semisubmersible
- semisweet
- semisynthetic
- Semite
- semiterrestrial
- Semitic
- Semiticist