Webster’s Revised Unabridged Dictionary · 1913
Specious
Spe′cious, a. [L. speciosusgood-looking, beautiful, specious, fr. species look, show, appearance; cf. F. spécoeux. See Species.] 1. Presenting a pleasing appearance; pleasing in form or look; showy.
Some [serpents] specious and beautiful to the eye. Bp. Richardson.
The rest, far greater part, Will deem in outward rites and specious forms Religion satisfied. Milton.
2. Apparently right; superficially fair, just, or correct, but not so in reality; appearing well at first view; plausible; as, specious reasoning; a specious argument.
Misled for a moment by the specious names of religion, liberty, and property. Macaulay.
In consequence of their greater command of specious expression. J. Morley.
Syn. — Plausible; showy; ostensible; colorable; feasible. See Plausible.
— Spe′xious·ly (#), adv. — Spe′cious·ness, n.