Definitions
1.AdjectiveSeemingly well-reasoned, plausible or true, but actually fallacious."This idea that we must see through what we have started is specious, however good it may sound."
2.AdjectiveEmploying fallacious but deceptively plausible arguments; deceitful.
3.AdjectiveHaving an attractive appearance intended to generate a favorable response; deceptively attractive.
4.AdjectiveBeautiful, pleasing to look at.
5.AdjectiveAlternative form of speciose (“rich in species”).