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protectant

[pruh-tek-tuh nt]
noun
  1. a substance, as a chemical spray, that provides protection, as against insects, frost, rust, etc.; protective agent.
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Origin of protectant

1660–70, for an earlier sense; protect + -ant
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for protectant

protectant

noun
  1. a chemical substance that affords protection, as against frost, rust, insects, etc
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for protectant

adj.

1660s, irregularly formed from protect + -ant. As a noun from 1935.

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Online Etymology Dictionary, © 2010 Douglas Harper