mendācĭuncŭlum, i, n. dim. [mendacium],
a little lie, trifling untruth, fib : quod tamen est mendaciunculis aspergendum (al. mendaciolis), Cic. de Or. 2, 59, 241 Orell. N. cr.
mendāciunculum ī, n dim.mendacium, a little untruth, fib, white lie . ...
An Elementary Latin Dictionary