specious Copy link • specious: prŏbābĭlis: or expr. by spĕcies: v. plausible, showy. Sometimes fūcātus may serve; but it expresses more than Eng.: v. false, counterfeit. Also, vendĭbĭlis, e (that makes the most of itself): Cic. Am,. 25, 96. (Not speciosus; which has a good sense.)