NIELLO
Ni*el"lo, n. Etym: [It. niello, LL. nigellum a black of blackish
enamel, fr. L. nigellus, dim. of niger black. See Negro, and cf.
Anneal.]
1. A metallic alloy of a deep black color.
2. The art, process, or method of decorating metal with incised designs filled with the black alloy.
3. A piece of metal, or any other object, so decorated.
4. An impression on paper taken from an ancient incised decoration or metal plate.
NIEPCE'S PROCESS
Niep"ce's proc"ess. (Photog.)
Defn: A process, now no longer used, invented by J. N. Niepce, a French chemist, in 1829. It depends upon the action of light in rendering a thin layer of bitumen, with which the plate is coated, insoluble.
NIFLE
Ni"fle, n. Etym: [OF.]
Defn: A trifle. [Obs.] Chaucer.
NIGGARD Nig"gard, n. Etym: [Icel. hnöggr niggardly, stingy + -ard; cf. Sw. njugg, AS. hneáw.]