tach·y·phy·lax·is (t k  -f -lk ss)n. pl. tach·y·phy·lax·es (-f -lks z) 1. Rapid desensitization to a toxic substance produced by inoculation with a series of small doses. 2. A rapidly decreasing response to a drug following administration of the initial doses. |
tachyphylaxis [ˌtækɪfɪˈlæksɪs]
n
(Medicine) very rapid development of tolerance or immunity to the effects of a drug
[New Latin, from tachy- + phylaxis on the model of prophylaxis. See prophylactic]
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