delirifacient,a.andn.Med.|dɪlɪrɪˈfeɪʃənt| [f. L. dēlīrium, delirium, dēlīrāre to be crazy + facient-em making.] A.adj. Causing or producing delirium. B.n. An agent or substance that produces delirium. 1875H. C. Wood Therap. (1879) 219 In some..morphia acts as a delirifacient.