Medical Dictionary
tachyphylaxis
noun tachy·phy·lax·is \ˌtak-i-fi-ˈlak-səs\
plural tachy·phy·lax·es \-ˌsēz\
Medical Definition of TACHYPHYLAXIS
: 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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