Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† Ŏphĭūchus, i, m., = Ὀφιοῦχος, the Serpent-holder, a constellation: quem claro perhibent Ophiuchum nomine Graii, Cic. N. D. 2, 42, 109 ex Arat.; Manil. 1, 331.