smooth tongued (smoTHtungd)

Using smooth words; smooth-spoken; plausible. Your dancing-masters and barbers are such finical, smooth-tongued, tattling fellows; and if you set 'em once a-talking they'll ne'er a-done, no more than when you set 'em a-fiddling. Wycherley, Gentleman Dancing-Master, iii. 1. smooth-winged (smöTH'wingd), a. In ornith., not rough-winged: specifically noting swallows which have not the peculiar serration of the outer primary of such genera as Psalidoprocne and Stelgidopteryx.