Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† hippūrus, i, m., = ἵππουρος, a fish (perh. golden carp, gold fish, Coryphaena hippurus, Linn.), Ov. Hal. 95; Plin. 9, 16, 24, § 57; 32, 11, 53, § 149.