Dictionary

nitrogen fixation

noun

Definition of NITROGEN FIXATION

:  the conversion of atmospheric nitrogen into a combined form (as ammonia) through chemical and especially biological action (as that of soil rhizobia)
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First Known Use of NITROGEN FIXATION

1895
NITROGEN FIXATION Defined for Kids

nitrogen fixation

noun nitrogen fix·a·tion \-fik-ˈsā-shən\

Definition of NITROGEN FIXATION for Kids

:  the changing of nitrogen into an available and useful form especially by bacteria (nitrogen–fixing bacteria)
Medical Dictionary

nitrogen fixation

noun

Medical Definition of NITROGEN FIXATION

1
:  the industrial conversion of free nitrogen into combined forms useful especially as starting materials for fertilizers or explosives
2
:  the metabolic assimilation of atmospheric nitrogen by soil microorganisms and especially rhizobia and its release for plant use by nitrification in the soil on the death of the microorganisms

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