tachyphylaxis
noun
tachy·phy·lax·is
ˌtak-i-fi-ˈlak-səs 
plural tachyphylaxes
-ˌsēz
: diminished response to later increments in a sequence of applications of a physiologically active substance (as the diminished pressor response that follows repeated injections of renin)
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“Tachyphylaxis.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/tachyphylaxis. Accessed 31 Oct. 2025.
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