Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
praedĭcāmentum, i, n. [1. praedico], that which is predicated, a quality; in plur. = categoriae, Aug. Conf. 4, 6; id. Trin. 5, 8; Isid. 2, 16, 1.