from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A blue, crystalline hydrous solution of copper sulfate, CuSO4·5H2O, one of the most important industrial copper salts, used in insecticides, germicides, and hair dyes and in the processing of leather and textiles.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. copper sulfate

from the GNU version of the Collaborative International Dictionary of English

  • adj. sulphate of copper, a violet blue crystallized salt, used in electric batteries, calico printing, etc.
  • n. See under Blue.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. hydrated blue crystalline form of copper sulfate


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