Dictionary.net

[Latin] Not really existing, although appearing to do so; apparent, not real nor true. F. aneurysm, F. ankylosis, see Aneurysm, Ankylosis. F. image, the image formed by the deviating eye in binocular diplopia. F. membrane, a coherent pellicle resembling an organized living membrane, but composed only of coagulated fibrin mixed with leucocytes and bacteria. F. pains, see Pain. F. passage, a hole made in the walls of a natural canal by an instrument introduced into the latter, F. pelvis, F. ribs, F. suture, see Pelvis, Ribs, Suture.