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nightside
nightspot
nightstand
nightstick
nighttime
nightwear
nighty
nigrescence
nigrosine
NIH
NIHE
nihil obstat
nihilism
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NII
Niigata
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nigrosine

ni·gro·sine [ níggrə sn, níggrəssin ] or ni·gro·sin [ níggrəssin ]


noun 
Definition:
 
black dye: a black aniline pigment or dye. Use: ink, polish, textile dye.

[Late 19th century. < Latin niger "black"]
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