Word.ws English Dictionary

blue jack

blue jack noun: copper sulfate.

Noun

blue jack (uncountable)

  1. (obsolete, rare) copper sulfate

Questions about blue jack

What does blue jack mean?
Blue jack means copper sulfate.
What part of speech is blue jack?
Blue jack is a noun.

Words near blue jack in the dictionary

  1. blue hydrogen
  2. blue ice
  3. blue iceberg
  4. blue icebergs
  5. Blue Island
  6. blue jack
  7. blue jaundice
  8. Blue Java
  9. Blue Javas
  10. blue jay
  11. blue jays

Source and license

Adapted from Wiktionary: blue jack (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “blue jack.” Word.ws, https://word.ws/blue_jack. Based on Wiktionary, CC BY-SA 4.0.