VERDIGRIS

verdigris

(noun) a green patina that forms on copper or brass or bronze that has been exposed to the air or water for long periods of time

verdigris, cupric acetate

(noun) a blue or green powder used as a paint pigment

verdigris

(verb) color verdigris

Source: WordNet® 3.1

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Etymology

Noun

verdigris (countable and uncountable, plural verdigrises)

A blue-green patina or rust that forms on copper-containing metals.

(chemistry, dated) Copper acetate.

The colour of this patina or material.

Synonyms

• (blue-green copper rust or patina): aerugo

• (copper acetate): Spanish green

• (color): Spanish green

Verb

verdigris (third-person singular simple present verdigrises, present participle verdigrising, simple past and past participle verdigrised)

To cover, or coat, with verdigris.

Source: Wiktionary

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Ver"di*gris, n. Etym: [F. vert-de-gris, apparently from verd, vert, green + de of + gris gray, but really a corruption of LL. viride aeris (equivalent to L. aerugo), from L. viridis green + aes, aeris, brass. See Verdant, and 2d Ore.]

1. (Chem.)

Definition: A green poisonous substance used as a pigment and drug, obtained by the action of acetic acid on copper, and consisting essentially of a complex mixture of several basic copper acetates.

2. The green rust formed on copper. [Colloq.]

Note: This rust is a carbonate of copper, and should not be confounded with true verdigris. U. S. Disp. Blue verdigris (Chem.), a verdigris having a blue color, used a pigment, etc.

– Distilled verdigris (Old Chem.), an acid copper acetate; -- so called because the acetic acid used in making it was obtained from distilled vinegar.

– Verdigris green, clear bluish green, the color of verdigris.

Ver"di*gris, v. t.

Definition: To cover, or coat, with verdigris. [R.] "An old verdigrised brass bugle." Hawthorne.

Source: Webster’s Unabridged Dictionary 1913 Edition

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