pseudŏmĕnos or -us, i, m., = ψευδόμενος;
in logic, a false , sophistical species of syllogism , Cic. Ac. 2 ( Luc. ), 48, 147; id. Fragm. ap. Non. 329, 19 (as Greek, Cic. Div. 2, 4, 11; Sen. Ep. 45, 10).
pseudomenos ī, m , ψευδόμενος, in logic, a false syllogism, piece of sophistry. ...
An Elementary Latin Dictionary