Noun
nigra (plural nigras)
(offensive, ethnic slur) A black person.
Nigra (plural Nigras)
English Wikipedia has an article on:NigraWikipedia
(Southern US) Alternative form of Negro
As I said, we have more Nigra professional men, more businessmen, we have substantial Nigra cotton planters. In fact, they have made more progress in the south than in the north. The master-servant relationship today is largely a northern product. James Eastland
Another well-known afferent is the nigrostriatal connection arising from the neurons of the substantia nigra pars compacta. Source: Internet
In Parkinson's disease, a disorder that affects neuromotor functioning, there is decreased neuromelanin in the substantia nigra and locus coeruleus as consequence of specific dropping out of dopaminergic and noradrenergic pigmented neurons. Source: Internet
Federal Writers' Project 1987, p. 13. In eastern Arkansas, one can find Taxodium (cypress), Quercus nigra (water oaks), and hickories with their roots submerged in the Mississippi Valley bayous indicative of the deep south. Source: Internet
Loss of dopamine neurons in the substantia nigra has been linked to Parkinson's disease. Source: Internet
Parkinson's disease is usually associated with a degraded substantia nigra pars compacta, but recent evidence suggests that PD affects a number of sites in the brain. Source: Internet