The Collaborative International Dictionary
Nitrogenizing
Nitrogenize \Ni"tro*gen*ize\, v. t. [imp. & p. p. Nitrogenized; p. pr. & vb. n. Nitrogenizing.] (Chem.) To combine, or impregnate, with nitrogen or its compounds.
Wiktionary
nitrogenizing
vb. (present participle of nitrogenize English)