Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
fictrix, īcis, f. [fingo], she that forms or fashions: ejus universae materiae fictrix et moderatrix divina est providentia, Cic. N. D. 3, 39, 92; so Tert. Resurr. Carn. 16.