unaˈttenuated,ppl.a. (un-1 8.) 1727Vin. Britan. 42 The gross and unattenuated Parts of the Liquor.1826Art of Brewing (ed. 2) 31 Keeping a quantity of this fermentable matter unattenuated.c1900Buck's Handbk.Med.Sci. VI. 833 (Cent.Suppl.), Rabbits inoculated with unattenuated rabies virus.