denitrify

from WordNet (r) 3.0 (2006)
denitrify
    v 1: remove nitrogen from; "Denitrify the soil" [ant: {nitrify}]
from The Collaborative International Dictionary of English v.0.48
Denitrify \De*ni"tri*fy\, v. t. [Pref. de- + nitrogen + -fy.]
   To deprive of, or free from, nitrogen.
   [1913 Webster]
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