ni·trog·e·nase 
(nī-trŏjə-nās′, -nāz′, nītrə-jə-)
(nī-trŏjə-nās′, -nāz′, nītrə-jə-)n.
An enzyme of nitrogen-fixing bacteria that catalyzes the conversion of nitrogen to ammonia.
- surety
- surety bond
- suretyship
- surf
- surface
- surface-active
- surface dive
- surface diver
- surface diving
- surface-effect ship
- surface mail
- surface of revolution
- surface plate
- surface structure
- surface tension
- surface-to-air missile
- surface-to-surface missile
- surface wave
- surfactant
- surf and turf
- surfbird
- surfboard
- surfboarder
- surfboarding
- surfboat