·adj Doubtful; not of definite form.
incertum, i, n., v. incertus, II. 2. ...
A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
incertum (1) ī, n incertus, an uncertainty : ne cuius incerti vanique auctor esset, L.: scribere l...
An Elementary Latin Dictionary