I. -e(ˌ)lō noun
( plural niel·li -_lē ; or niellos )
Etymology: Italian, from Medieval Latin nigellum, from neuter of Latin nigellus blackish, dark, diminutive of niger black
1. : any of several metallic alloys of sulfur with silver, copper or lead having a deep black color
2. : the art, process, or method of decorating metal with incised designs filled with niello ; also : work of this kind
3. : an object decorated with niello
4. : an impression on paper taken from the engraved or incised surface before niello has been inlaid
II. transitive verb
( -ed/-ing/-s )
: to inlay or ornament with niello