desensitizer

noun
de·​sen·​si·​tiz·​er
variants: also British desensitiser \ (ˈ)dē-​ˈsen(t)-​sə-​ˌtī-​zər How to pronounce desensitiser (audio) \

Medical Definition of desensitizer

: a desensitizing agent especially : a drug that reduces sensitivity to pain a dentin desensitizer

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