Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† ūrănoscŏpus, i, m = οὐρανοσκόπος (the heaven-gazer), a sea-fish, called also callionymus, Plin. 32, 7, 24, § 69; 32, 11, 53, § 146.