Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
hălĭmŏn, i, n., = ἅλιμον, a plant, the orach (Atriplex halimus of Linn.), Plin. 17, 24, 37, § 239; cf. id. 22, 22, 33, § 73.