Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† Măcrŏchīr, m., = Μακρόχειρ, Longhand, = Lat. Longimanus, a surname of king Artaxerxes, Nep. Reg. 1, 3 sq.; Amm. 30, 8, 4.