nigrification


From The Collaborative International Dictionary of English v.0.48:

Nigrification \Nig`ri*fi*ca"tion\, n. [L. nigrificare to
   blacken; niger black + -ficare (in comp.) to make. See
   -fy.]
   The act or process of making black. [R.] --Johnson.
   [1913 Webster]
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