NEGRO a.
- negro corn, the Indian millet or durra; -- so called in the West Indies. see Durra. McElrath. -- Negro fly (Zoöl.), a black dipterous fly (Psila rosæ) which, in the larval state, is injurious to carrots; -- called also carrot fly. -- Negro head (Com.), Cavendish tobacco. [Cant] McElrath. -- Negro monkey (Zoöl.), t…
NICKER NUT n.
A rounded seed, rather smaller than a nutmeg, having a hard smooth shell, and a yellowish or bluish color. The seeds grow in the prickly pods of tropical, woody climbers of the genus Cæsalpinia. C. Bonduc has yellowish seeds; C.Bonducella, bluish gray. [Spelt also neckar nut, nickar nut.]
NONMETAL n.
set of elements which, as contrasted with the metals, possess, produce, or receive, acid rather than basic properties; a metalloid; as, oxygen, sulphur, and chlorine are nonmetals.
PETROLEUM n.
the distillation of crude petroleum at a temperature of 170° Fahr., or below. The term is rather loosely applied to a considerable range of products, including benzine and ligroin. The terms petroleum ether, and naphtha, are sometimes applied to the still more volatile products, including rhigolene, gasoline, cymogene,…