a copper salt found naturally as chalcanthite and made by the action of sulphuric acid on copper oxide. It usually exists as blue crystals of the pentahydrate that form a white anhydrous powder when heated: used as a mordant, in electroplating, and in plant sprays. Formula: CuSO4
Examples of 'copper sulphate' in a sentence
copper sulphate
No mention is made of the use of copper sulphate treatments for trees.
Times, Sunday Times (2012)
This eerily entrancing space sparkles with light reflected from the millions of midnight-blue copper sulphate crystals that line its walls.
Times, Sunday Times (2013)
Our neighbours cannot have been unaware of the use and effectiveness of copper sulphate treatments.