Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† corchŏros or -rus, i, m., = κόρχορος, a poor kind of pulse, growing wild: Corchorus olitorius, Linn.; Plin. 21, 32, 106, § 183; 25, 13, 92, § 144.