Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† capnŏs, i, f., = καπνός, smoke; a plant, also called in pure Lat. pes gallinaceus, fumitory, of several species, Plin. 25, 19, 98, § 155 sq.; 26, 8, 36, § 57 (also called capnĭon = καπνίον).