Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
lānĭfĭcĭum, ii, n. [lanificus], the working of wool, i. e. spinning, weaving, etc. (ante-class. and post-Aug.): de lanificio neminem metuo, una aetate quae sit, Plaut. Merc. 3, 1, 22: lanificii curam suscipere, Col. 12 praef. § 9: usum lanificii docere, Just. 2, 6, 5; 2, 4, 8: filiam et neptes lanificio assuefacere, Suet. Aug. 64.