African nation, named for the river Niger, mentioned by that name 1520s (Leo Africanus), probably an alteration (by influence of Latin niger "black") of a local Tuareg name, egereou n-igereouen, from egereou "big river, sea" + n-igereouen, plural of that word. Translated in Arabic as nahr al-anhur "river of rivers."
雙語例句
1. Aspergillus niger SL - 08 was treated by ultraviolet ( UV ) and nitrosoguanidine ( NTG ).