protectant

[ pruh-tek-tuh nt ]
/ prəˈtɛk tənt /

noun

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. 2020

British Dictionary definitions for protectant

protectant
/ (prəˈtɛktənt) /

noun

a chemical substance that affords protection, as against frost, rust, insects, etc
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