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opacifier

noun
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opaci·​fi·​er
plural -s

Definition of opacifier

: a constituent or additive (as of an enamel, a paint, a glass) that tends to opacify the system of which it is a part

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“Opacifier.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/opacifier. Accessed 27 January 2020.

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