Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
The word arctium could not be parsed. Trying a normal dictionary lookup:
No entries found. Showing closest matches:
† arctĭcus, a, um, adj., = ἀρκτικός (pertaining to the constellation of the Bear, ἄρκτος; hence), northern, arctic: circulus, Hyg. Astr. 1, 6.
† arctĭon, i, n., = ἄρκτιον, a plant, also called arcturus, Plin. 27, 5, 16, § 33.