† petty ˈfidianObs.nonce-wd. [f. petty a. + L. fid-ēs faith + -ian.] One ‘of little faith’. 1647Trapp Comm.Matt. viii. 26 O ye of little faith. Ye petty fidians; He calleth them not nullifidians.Ibid. xiv. 31 Thou petty-fidian, small-faith: Christ chides Peter, and yet helps him.