Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
* maldăcon, i, n., the gum of the tree called bdellium: vicina est Bactriana, in qua bdellium nom inatissimum. Arbor nigra est … gummi alii brochon appellant, alii malacham, alii maldacon, Plin. 12, 9, 19, § 35.