Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† lĕpĭdĭum, i, n., = λεπίδιον, a plant, garden-cress, pepperwort: Lepidium sativum, Linn.; Plin. 19, 8, 51, § 166; Col. 11, 3, 16; 41; 12, 8, 3.