a. rare1. [as if f. L. falsidic-us falsehood-telling (f. L. falsum falsehood + dic- weak stem of dīcĕre to speak) + -AL: on the analogy of VERIDICAL.] Suggesting as true what is really false; falsehood-telling.
1886. Gurney and Myers, Phantasms of the Living, II. 284. Has failed to produce any clear cases of the communicability of illusory (or falsidical) hallucinations.