nigris
nigris is a Latin form of niger, meaning “black, dark”. It is the ablative plural masculine adjective.
Found 41 times in the Latin texts on Socratos.
Where it is used
Vergil, Georgics 2.214: et tophus scaber et nigris exesa chelydris
Martial, Epigrammata 4.2.2: Nigris munus Horatius lacernis,
All forms of niger (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.