Hypertext Webster Gateway: "Niello"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Niello \Ni*el"lo\, n. [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.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Niello \Ni*el"lo\, n.
An impression on paper taken from the engraved or incised
surface before the niello alloy has been inlaid.
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