Baretti: A dictionary of the English and Italian languages
Sciólt-o, adj. & part.
1. V. sciogliere & sciorre;2. free, disengaged; 3. dissolved, liquefied, melted. — di membra, agile, quick, nimble, active. Versi sciolti, blank verse. Libro —,a book in sheets. Parole sciolte, prose. A briglia sciolta, at full speed; adv. Sciólt-aménte.
Florio: a worlde of wordes, or most copious, dictionarie in Italian and English
sciolto: loose, free, at liberty, vntide, vntangled, vnsnared. Also quit, absolued or discharged. Also quick, nimble and full of agility. Also a kind of verse among the Italians, a loose verse a blancke verse.