copperas
Americannoun
noun
Etymology
Origin of copperas
1400–50; late Middle English coperas, variant of Middle English coperose < Medieval Latin ( aqua ) cuprōsa copperish (water). See copper 1, -ose 1
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Early mine operators realized that they could also extract copper from copperas.
From Washington Times • Jul. 3, 2017
Olive Green Mordant the reed in a solution of two teaspoonfuls of copperas in one quart of water.
From Practical Basketry by Gill, Anna A.
Copper dissolved in the vitriolic acid forms crystals of a blot colour, called blue copperas.
From Heads of Lectures on a Course of Experimental Philosophy: Particularly Including Chemistry by Priestley, Joseph
Sumach, logwood, iron liquor, and copperas, will form a black.
From Blacker's Art of Fly Making, &c. Comprising Angling, & Dyeing of Colours, with Engravings of Salmon & Trout Flies by Blacker, William
Colcothar, kol′kō-thar, n. a dark-red iron peroxide formed by calcining copperas.
From Chambers's Twentieth Century Dictionary (part 1 of 4: A-D) by Various
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
