from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The conversion of atmospheric nitrogen into compounds, such as ammonia, by natural agencies or various industrial processes.
- n. The conversion by certain soil microorganisms, such as rhizobia, of atmospheric nitrogen into compounds that plants and other organisms can assimilate.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. ,(biochemistry) the conversion of atmospheric nitrogen into ammonia and organic derivatives, by natural means, especially such conversion, by microorganisms in the soil, into a form that can be assimilated by plants
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the assimilation of atmospheric nitrogen by soil bacteria and its release for plant use on the death of the bacteria
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