a chemical used to etch designs into metal, glass, or other material.

1925–30; etch + -ant Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
etchant (ˈɛtʃənt)
any acid or corrosive used for etching

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Example sentences
The resist layer selectively protects the circuit areas from etchant whereas the remaining copper foil is etched away.
Currently, hazardous oxidants such as chlorine are used to regenerate this etchant.
To achieve this bond the tooth must be prepared with an acid etchant.
Etchant that is sent off-site is processed to recover the copper and regenerate the etchant for reuse.
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