black copper

American  

noun

Metallurgy.

1. a regulus of 95-percent-pure copper, produced in a blast furnace by smelting oxidized copper ores.

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Example Sentences

Looking at the flock, Ms. Saye pointed out a bantam Easter egger, a breed that lays blue eggs, and the black copper marans, a breed that is appreciated especially by French chefs for their eggs.

From New York Times • Apr. 19, 2014

And for the lady of devastating chic and ophidian fascination, who looks forward to penthouses rather than backward at palazzos, is the Cadillac-Fleetwood Art Moderne, a sleek transformable cabriolet in aluminum, black, copper, snakewood.

From Time Magazine Archive

The black, copper coffin was placed upon a gun carriage and draped with the single-starred banner of the Republic.

From Time Magazine Archive

This time a face, a high forehead, came moonlike to the black copper screen: "Who are you?"

From Time Magazine Archive

The process … consists in alternate partial roasting and reduction to 'matte,' and eventually to black copper.

From The Philippine Islands, 1493-1898 — Volume 06 of 55 1583-1588 Explorations by Early Navigators, Descriptions of the Islands and Their Peoples, Their History and Records of the Catholic Missions, as Related in Contemporaneous Books and Manuscripts, Showing the Political, Economic, Commercial and Religious Conditions of Those Islands from Their Earliest Relations with European Nations to the Close of the Nineteenth Century by Robertson, James Alexander